A 20.0-ml sample of a 0.200 mhbr solution is titrated with a 0.200 mnaoh solution. calculate the ph of the solution after the following volumes of base have been added.
The calculated pH of the solutions are given below:
The pH of the solution after 14.0 ml of base is added to it is calculated as 1.45. The pH of the solution after 19.8 ml of base is added to it is calculated as 3.0The pH of the solution after 20.0 ml of base is added to it is calculated as 7. What is pH?This is the level of acidity or alkalinity of an aqueous solution. The pH of a substances tells if its an acid, base or neutral.
HBr and NaOH while in water would dissociate and they would become H+ and OH- respectively.
Mol of HBr = Mol * Vol
= 0.200 * 20mL
= 4 mmol
A. Moles of NaOH added
= 0.2 X 14
= 2.8 mmol
Moles of H+ that did not react
= 4 - 2.8
= 1.2 mmol
1.2/1000 = 0.0012 moles
Total volume = 20 + 14
= 34 mL to litres
= 0.034 L
Molarity of H+ = 0.0012 / 0.034L
= 0.035 M
-log[0.035] = 1.45
The pH of the solution is 1.45
B. NaOH added = 19.8 * 0.2 =
3.96 mmoles
The unreacted solution
= 4.0 - 3.96
= 0.04 mmol
0.04/1000 = 0.00004 moles
Total volume = 20 + 19.8
= 39.8mL
Converted to litres = 0.0398L
Molarity = 0.00004 / 0.0398L
= 0.001
-log(0.001) = 3.0
The ph Is therefore 3.0
C. Moles of NaOH added = 0.2*20mL = 4mmol
All the H+ are going to be consumed here. This would result into a neutral solution pH = 7
Complete question:
20.0 mL sample of 0.200 M HBr solution is titrated with 0.200 M NaOH solution. Calculate the PH of the solution after the following volumes of base have been added.
A. 14.0 mL
B. 19.8 mL
C. 20.0 mL
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Math accelerated chapter 11 congruence similarity and transformations answers
An example of congruence similarity and transformations work is " If the measures of the angles of a triangle are in the ratio 4 : 5 : 9. The triangle is?.
What is right angled triangle?A right triangle is known to be often called right-angled triangle. It is said to be a triangle that is composed of one angle which is at a right angle and two sides which are said to be perpendicular.
So lets take the angles to be 4x, 5x and 9x
We add them to be 4x + 5x + 9x =180°
18x=180° =
x= 180/18
x = 18
So therefore the angles are:
4×10°
=40°
5×10°
=50°
9×10°
=90°
So therefore since one of the angle is 90° and as such, the triangle is right angled triangle.
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The ratio of hybrid cars to gasoline-powered cars in the parking lot of a local office building is 3:11. if there are 280 cars in the lot and one is to be selected at random to get the reserved parking space nearest the building, find the probability the car selected is a hybrid. express your answer as a fraction.
Answer:
The probability that it will be a hybrid is 21.4%.
Probability is the ratio of number of occurrences to total number of possible occurrences.
Given a total number of 280 cars. The number of hybrid cars is gotten by using the ratio.
Number of hybrid cars = (3/14) * 280 = 60 cars
Probability of picking a hybrid car = Number of hybrid car/total number of cars = 60 cars / 280 cars = 21.4%
Therefore the probability that it will be a hybrid is 21.4%.
Explanation:
;-
The writer wants to add a sentence after sentence 11 to conclude the passage with a quotation that effectively restates and reinforces the overall argument. which choice best accomplishes this goal?
The best conclusion reinforces argument is;Today is the best indicator of tomorrow, but today decreases in value for points further in the future.”
How to conclude a Passage?
When we are trying to conclude a passage, we are basically trying to close out the overall text or story line with a quote or quotes that best captures the idea or argument being portrayed in the original text.
Now, the argument from the text is a relationship between today, yesterday and tomorrow and the importance of today in that regards.
Looking at the given options as seen in the brainly link below, the best choice that reinforces the overall argument is that of political scientists Joseph Coates and Jennifer Jarratt who said “Today is the best indicator of tomorrow, but today decreases in value for points further in the future.”
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what does this part of the soliloquy reveal about hamlet?
Answer:What does this part of the soliloquy reveal about Hamlet? He still loves Ophelia. He believes the ghost was real. He is planning his revenge.
Explanation:
WILL MARK YOU BRAINLIST DUE TODAY
Pick one of your ideas for an essay example and write an introductory paragraph for an essay about a situation that changed your mind about something you had believed?
Answer:
I used to think it was important to conform to what other people thought about me. The day I realized it wasn’t was the day I became free.
Find the exact volume of this cylinder in terms of π. refer to your staar 8th grade math reference sheet for the appropriate formula. question 1 options: 45π cm3 90π cm3 225π cm3 900π cm3
The exact volume of the given cylinder with a height of 9cm and a diameter of 10 cm is; 225π cm³
What is the volume of the cylinder?We are given;
height of cylinder; h = 9 cm
diameter of cylinder; d = 10 cm
Thus, radius; r = d/2 = 10/2 = 5 cm
Formula for volume of a cylinder is;
V = πr²h
V = π * 5² * 9
V = 225π cm³
In conclusion, the volume of the cylinder is 225π cm³
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(1)is your computer acting up? (2) have your efforts to fix it been useless? (3) are you unsure of who to call? (4) well, we're here to help. (5) kayser computer care is the best choice to fix your computer woes. (6) our technicians are incredibly experienced, and our rates are astoundingly reasonable. which sentence states the writer's claim?
The sentence that states the writer's claim is the number 5:
"Kayser Computer Care is the best choice to fix your computer problems".What is a claim?It corresponds to the presentation of the central idea of a text, as an argument, which you will support with evidence throughout the text. It is a resource widely used in academic research articles, argumentative essays and persuasive speeches.
Therefore, in a commercial message, the claim aims to provide persuasion to the reader through evidence that supports the initial claim.
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What is the first element with an atomic mass greater
Answer:
Ruthenium
Explanation:
I hope this helps
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What is (f+g)(x)? f(x)=x2−36 g(x)=x3+2x2−10 enter your answer in standard form in the box. (f+g)(x)=
Answer: i believe the answer is x^3+3x^2-46
Explanation:
Which detail in the excerpt identifies it as fantasy? the bagginses throw extravagant parties. bilbo, a hobbit, is going to be 111. frodo is turning 33 years old. thirty-three is an important number.
The detail in the given excerpt titled The Fellowship of the Ring that identifies as a fantasy is called; Bilbo has a magic ring
What is the given excerpt fantasy:This novel titled "The Fellowship of the Ring" written by J.R.R. Tolkien has repetitive elements that define it as a fantasy novel.
These fantasy words include imagined worlds, mythical creatures and the supernatural. Since Bilbo was going to be eleventy-one 111 has these elements, then Bilbo belongs to the hobbits community which are mythical and fanatical creatures besides the age he is about to reach is unnatural even for a Hobbit.
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Answer:
B
Explanation:
2022
Rain water becomes groundwater through what process?
Saxon algebra 1 student practice workbook 1st edition solutions
which of the following types of drugs would not be appropriate for a patient with chronic asthma?
An asthmatic patient is a patient whose medical condition is termed asthma
Drugs a patient with chronic asthma should avoidThe asthma condition causes the patient the following medical conditions:
CoughDifficulty in breathingWheezingA patient with a chronic asthma must avoid drugs that can aggravate the above conditions.
Some of these drugs are:
Aspirin.PainkillersNon-steroidal anti-inflammatory drugsRead more about medical solutions at:
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What is the relationship between percentiles and quartiles
Answer:
Quartiles are special cases of percentiles.
Explanation:
Q1 is the 25th percentile, Q2 is the 50th percentile.
What is the slope of the line tangent to the polar curve r=3θ at the point where θ=π2 ?
The slope of the line tangent to the polar curve r = 3θ at the point where θ = π/2 is; Undefined
What is the slope of the line tangent?
By converting into parametric equations, we have;
x(θ) = r(θ) cos θ = cos 3θ cos θ
y(θ) = r(θ) sin θ = cos 3θ sin θ
By product rule;
x'(θ) = -sin 3θ cos θ - cos 3θ sin θ
x'(π/2) = -sin 3(π/2) cos (π/2) - cos 3(π/2) sin (π/2)
x'(π/2) = 0
y'(θ) = -sin 3θ sin θ + cos 3θ cos θ
y'(π/2) = -sin 3(π/2) sin (π/2) + cos 3(π/2) cos (π/2)
y'(π/2) = 1
The slope m of the curve is gotten from;
m = y'(π/2)/x'(π/2)
m = 1/0
Thus the slope is undefined
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Every rectangle is a quadrilateral true or false brainly
Answer:
TRUE
Explanation:
Answer:
yes
Explanation:
because a quadrillsteral is a shape with four sides
How do you multiply radicals containing binomials brainly
Answer:
And if we have a binomial times a binomial we'll have four products or we can think of this as double distribution. We distribute the a so we'd have a times C plus a times D.
Explanation:
Jacob would like to purchase a coat and a hat for a ski trip. the coat is $62. 75 and the hat is $14. 25. if the sales tax rate is 8%, then what will be the amount of tax on jacob’s purchase?
The amount of tax on jacob’s purchase is $6.16.
What is Tax rate?Tax rate is simply the ratio at which a business or person is taxed.
To determine the amount of tax on Jacob’s purchase, we simply multiply the total purchase made by the tax rate.
Total purchase by Jacob; [tex]P = 62.75 + 14.25 = 77[/tex]
Sales tax rate; [tex]r = 8/100[/tex]
Hence, the amount of tax on jacob’s purchase is;
[tex]= 77 * \frac{8}{100}\\ \\= 6.16[/tex]
Therefore, the amount of tax on jacob’s purchase is $6.16.
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classify these salts as acidic, basic, or neutral.
A set of stairs leading to the entrance of a building is designed in the shape of an isosceles trapezoid with the longer base at the bottom of the stairs and the shorter base at the top. If the bottom of the stairs is 21 feet wide and the top is 14 feet wide, find the width of the stairs halfway to the top
Answer:
17.5
Explanation:
have to find the midsegment of the rhombus.
Describe the importance of the clay sculpture when creating bronze sculptures. (site 1)
Given that the molar mass of nacl is 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of nacl in 500. ml of solution? use molarity equals startfraction moles of solute over liters of solution endfraction.. 0.333 m 0.751 m 1.50 m 3.00 m
The molarity of the solution that contains 87.75 g of NaCl in 500 mL of the solution is 3 M
What is molarity?This is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:
Molarity = mole / Volume
How to determine the mole of NaCl Mass of NaCl = 87.75 g ofMolar mass of NaCl = 23 + 35.5 = 58.5 g/mol Mole of NaCl =?Mole = mass / molar mass
Mole of NaCl = 87.75 / 58.5
Mole of NaCl = 1.5 mole
How to determine the molarity Mole of NaCl = 1.5 mole Volume = 500 mL = 500 / 1000 = 0.5 L Molarity =?Molarity = mole / Volume
Molarity = 1.5 / 0.5
Molarity = 3 M
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Answer:
i think its d
Explanation:
eez nuts
How can the rebuttal best address the counterclaim? the rebuttal should include examples of jobs that are available to students and the problems associated with those jobs. the rebuttal should acknowledge that school remains a priority and discuss the benefits of a balance between school and work. the rebuttal should address the need for a discussion on the matter by restating both points before reaching a conclusion. the rebuttal should state a logical explanation for both opinions before granting credibility to the need for school to remain a priority.
Answer:
The rebuttal should acknowledge that school remains
a priority and discuss the benefits of a balance
between school and work.
Explanation:
Answer:
B. The rebuttal should acknowledge that school remains a priority and discuss the benefits of a balance between school and work.
Explanation:
edge 2022 <3
How many molecules of no2 can be formed using 2 molecules of no
The number of molecules of NO₂ that can be obtained when 2 molecules of NO react is 2 molecules
Balanced equationWe'll begin by writing the balanced equation for the reaction. This is given below:
NO + O₂ —> NO₂
There are 3 atoms of O on the left side and 2 atoms on the right side. It can be balanced by writing 2 before NO and NO₂ as shown below
2NO + O₂ —> 2NO₂
Now, the equation is balanced
From the balanced equation above,
We can see that 2 molecules of NO will react to produce 2 molecules of NO₂.
Thus, we can conclude that 2 molecules of NO₂ will be obtained from the reaction.
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It is generally believed that nearsightedness affects about % of children in a certain region. a school district tests the vision of incoming kindergarten children. how many would be expected to be nearsighted? what is the standard deviation for the number of nearsighted children in this group?
Algebra 1: concepts, skills, and problem solving (california) solutions
An example of Algebra 1 problem solving question is (3 + a) + b².
What is algebra?The Basics of Algebra are known to cover simple math areas such as numbers, variables, multiplication, division that are found in algebraic expressions.
Looking at this question, (3 + a) + b², you collect like terms;
(3 + a) + b²
= 3a + b²
Therefore, the answer is 3a + b².
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Monitoring progress and modeling with mathematics algebra 1 answers
An example of Monitoring progress and modeling with mathematics algebra is solve the Linear Equations of x − 3 = -5.
What is Progress monitoring?In project management, progress monitoring is known to be the act of forming project plans, setting goals and systematically analyzing results to known the progress of the project. This can also be done through the use of mathematical functions.
The Linear Equations of x − 3 = -5.
x = -5 + 3
x = -2
Therefore, the answer is -2.
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In the passage, pope uses parallelism in the line "and to their proper operation still." antithesis in the line "ascribe all good; to their improper, ill." parallelism in the line "self-love, the spring of motion, acts the soul." antithesis in the line "reason’s comparing balance rules the whole."
In the passage, pope uses parallelism to show Antithesis in the line “Ascribe all Good; to their improper, Ill.”
What is Parallelism?This is a term that is often called parallel structure. It is when a phrases in a sentence is said to be familiar or when they are said to have the same grammatical structure.
Note that In the passage, pope uses parallelism to show Antithesis in the line “Ascribe all Good; to their improper, Ill.” as he wanted them to see what he is trying to convey.
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Two skydivers of different masses jump from a plane. in three to five sentences, explain how their falls compare, including the effects of gravity, mass, and air resistance.
When a skydiver jumps out of a plane, the skydiver is said to accelerates down as a result of the force of gravity. No air resistance do acts in the upwards direction, and thus, the resultant force is said to be acting downwards.
Due to the above, the skydiver is known to moves or accelerates towards the ground.
How gravity and air resistance affect the motion of the skydiver?Note that before the parachute of a skydiver is opened, the air resistance is known to be more than the downward force of gravity.
The net force and the acceleration on the falling skydiver is said to be often upward. And as such, the upward net force on a downward falling object such as the skydiver would cause the diver to slow down.
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