Logo
Home Study Material Contact Search
AI Chat FREE
  1. sciences
  2. chemistry
  3. 1a. determine the ph of a koh solution made by mix

1A. Determine the pH of a KOH solution made by mixing 0.251 g KOH (s) with...

Free

50.1K

Verified Solution

Question

Chemistry

1A. Determine the pH of a KOH solution made by mixing 0.251 gKOH (s) with enough water to make 1.00 × 102 mL of solution. Assume100% purity for the KOH (s).

1B. Predict the direction in which the equilibrium will lie forthe following reaction:     H3PO4(aq) +HSO4−(aq) H2PO4−(aq) + H2SO4(aq).    Ka1(H3PO4) =7.5 × 10−3;

Ka(H2SO4) = very large    

2. For H3PO4, Ka1 = 7.3 × 10−3, Ka2 = 6.2 × 10−6, and Ka3 = 4.8× 10−13. An aqueous solution of Na3PO4 therefore would be?

2B. Calculate the pH of a solution of 0.10 M HA- (aq). The acidH2A has Ka1 = 6.5 × 10−2 and Ka2 = 6.1 × 10–5.  

Answer & Explanation Solved by verified expert
4.4 Ratings (882 Votes)

1A. normality of KOH = w/mwt*1000/V

                     = (0.251/56.1)*(1000/100)

                      = 0.45 N

      pH = 14- (-log(OH-))

         = 14- (-log0.45)

         = 13.65

1B. as H2SO4 is strong acid , it can donates proton easily , so that equilibrium shifts leftside

2. Na3PO4 - Is a salt of weakacid,strongbase . so that it is basic in nature.

2B. the pH of HA- depends upon ka2 only

   so that,

   pH = 1/2(pka2-logC)

   pka2 = -logka2 = -log(6.1*10^-5) = 4.215

      = 1/2(4.215 - log0.1)

      pH = 2.6075
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Q

Social media metrics are necessary to determine how to manage your business. There are many metrics...

General Management
Q

Question 01. Select an Organization of your choice which is known for excellent team performance and...

General Management
Q

7 In the given circuit the potential difference across resistance is 80 V and power...

Physics
Q

Find the equations of the tangent lines at the point where the curve crosses itself...

Geometry
Q

Suppose a triangle has two sides of length 32 and 35 and that the angle...

Geometry
Q

The sandwich chain was embarrassed to find out that the mean length of a foot...

Statistics
Q

13 Determin whether y is function of x y 3x 1 a no b ye...

Calculus
Q

House A 6 320 Figure 1 Figure 2 Tessa has 80 ft of fencing available...

Algebra
Q

5 Simplify 3 48 6 108 6 Multiply Give your answer in radical form 11...

Algebra
Q

Sam and Devon agree to go into business together selling collegelicensed clothing. According...

Accounting
Q

Using the following accounts and balances, prepare the stockholders' equity section of the balance sheet....

Accounting
Q

Chapter 14, Problem 1CPP Only need help with 5 - 8. I have 1...

Accounting