1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kow [346]
4 years ago
6

How many grams of solid potassium hypochlorite should be added to 2.00 L of a 0.244 M hypochlorous acid solution to prepare a bu

ffer with a pH of 6.733 ? ka = 3.5×10-8
grams potassium hypochlorite = g.
Chemistry
1 answer:
Olin [163]4 years ago
7 0

Answer:

8.2763 g

Explanation:

Considering the Henderson- Hasselbalch equation for the calculation of the pH of the buffer solution as:

pH=pKa+log[base]/[acid]

Where Ka is the dissociation constant of the acid.

Given that the acid dissociation constant = 3.5×10⁻⁸

pKa = - log (Ka) = - log (3.5×10⁻⁸) = 7.46

Given concentration of acid = [acid] = 0.244 M

pH = 6.733

So,

6.733 = 7.46+log[base]/0.244

[Base] = 0.0457 M

Given that Volume = 2 L

So, Moles = Molarity × Volume

Moles = 0.0457 × 2 = 0.0914 moles

Molar mass of potassium hypochlorite = 90.55 g/mol

Mass = Moles × Molar mass = (0.0914 × 90.55) g = <u>8.2763 g</u>

You might be interested in
How are landslides and mudflows similar and how are they different?
Masteriza [31]
- - Landslides are caused by earth quakes or uneven ground leveled movement and a mudslide is caused by lost of witness, like rain, causing the mud to turn into a runny texture.
 <span />
5 0
4 years ago
HELP ASAP
Ghella [55]

potassium reacts the most vigorously.

7 0
3 years ago
Suppose the formation of nitrosyl chloride proceeds by the following mechanism: step elementary reaction rate constant 1 NO(g) +
adoni [48]

Answer:

Overall reaction equation;

2NO(g) +Cl2(g) -----> 2NOCl (g)

Explanation:

Given

1) NO(g) + Cl2(g) → NOCl2(g)

2) NOCl2(g) + NO(g) → 2NOCl(g)

Overall reaction equation;

2NO(g) +Cl2(g) -----> 2NOCl (g)

k1= [NOCl2]

k-1= [NO] [Cl2]

k2 = [NOCl2] [NO]

Equilibrium for the first equation (reaction 1)

K= k1/k-1 = [NOCl2]/[NO] [Cl2]

Therefore

[NOCl2] = k1/k-1 [NO] [Cl2]

Rate= k2× k1/k-1 [NO]^2 [Cl2]

Rate = Koverall [NO]^2 [Cl2]

Where Koverall= k1k2/k-1

3 0
4 years ago
What class of lever is shown below?
Margarita [4]

4                                          

I don't want to say anything else

8 0
2 years ago
Read 2 more answers
1.00 atm = 760 mm Hg. 5.00 atm = ___________ mm HG Select one: a. 5 b. 152 c. 3800 d. 3.34 X 1010
olasank [31]

Answer:

C

answer is 5×760 mm of Hg = 3800

8 0
3 years ago
Read 2 more answers
Other questions:
  • you are a scientist working on increasing the effeciciency of appliances to waste less electricity.Yoy are running experiments m
    14·1 answer
  • How would you prepare 2-methyl-2-propanol via a grignard with dimethyl carbonate as your carbonyl source? show all reagents?
    9·1 answer
  • What is the bond order of c2−?express the bond order numerically?
    5·2 answers
  • Initial temperature of metal= 100 C°
    8·1 answer
  • A generic solid, X, has a molar mass of 78.2 g/mol. In a constant-pressure calorimeter, 12.6 g of X is dissolved in 337 g of wat
    10·1 answer
  • Why does his teacher ask him to balance the equation by including the correct coefficients?
    13·1 answer
  • Two oxides, X and Y, are added separately to dilute sulfuric acid and Giste sesiun toycrolide,
    7·1 answer
  • Please help me with this chem question!!
    10·1 answer
  • An element is defined as a substance that is composed of only one type of atom. True or false?.
    10·2 answers
  • If the concentration of the product NH3 was increased from 1.0 x 10-4 M to 5.6 x 10-3 M, calculate the reaction quotient (Q) and
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!