Calculating molarity of solutions

Question

Assignment:

Question 1. Label each of the following as an acid, base or salt, explaining your answer:

a. KOH    b. HCl

c. Ba(OH)₂    d. H₃PO₄

e. FeSO₄

Question 2. Calculate the pH of the following solutions with the given [H⁺] or [OH^-] and indicate whether it is an acid or base:

a. [OH^-] = 0.01

b. [H⁺] = 0.001

c. [OH^-] = 0.00001

Question 3. Calculate the molarity of the following solutions

a. 25 grams of KNO₃ dissolved to make 300 ml of solution

b. 50 grams of C₅H₁₀O₅ dissolved to make 400 ml of solution

Question 4. Calculate the molarity of the following solutions from this acid-base titration data:

a. If 200 ml of NaOH of unknown concentration with a methyl red indicator present is titrated with [0.250 M] H2SO4, the yellow solution turns red after 40.5 ml of the H₂SO₄ is added. What is the molarity of the NaOH solution?

b. If 300 ml of H₂SO₄ of unknown concentration with a methyl orange indicator present is titrated with [0.200 M] Mg(OH)₂, the red solution turns yellow after 30.6 ml of the Mg(OH)₂ is added. What is the molarity of the H₂SO₄ solution?

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