How do you solve these problems 8.30a and B How do you solve these problems 8.30

Question

How do you solve these problems 8.30a and B
How do you solve these problems 8.30a and B
pter 8 Acids and Bases Determine whether a solution containing each of the following substances is a reasoning. PROBLEM 8.29 b.HF and KF C. CH3COOH alone a. HBr and NaBr PROBLEM 8.30 Consider a buffer prepared from the weak acid HCOs and its conjugate base Co.2 HCO,-(aa) + H20(1)- CO32-(aq) + H30.(aq) a. what happens to the concentrations of HCO3-and CO32 when a small amount of acid to the buffer? b. What happens to the concentrations of HCOs and CO,2 when a small amount of base is added to the buffer? 8.8B FOCUS ON THE ENVIRONMENT Acid Rain and a Naturally Buffered Lake Unpolluted rainwater is not a neutral solution with a pH of 7; rather, because it contains disshe carbon dioxide, it is slightly acidic with a pH of about 5.6. CO(g) + 2H2OU)H30 (aq) + HCO (aq) carbon dioxide from the air A low concentration of HO gives rainwater a pH

Explanation / Answer

Ans 8.30 : The buffer is a solution that resists any changes in the pH , when a small amount of acid or base is added into it.

So here :

a) When the acid is added into the buffer , the H+ released by the acid is neutralised by the conjugate base .

CO32- + H+ = HCO3-

b) When the base is added in the buffer, the OH- is neutralised by the conjugate acid.

H3O+ + OH- = 2H2O

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