Tell whether 0.1 M solutions of the following salts would be acidic, neutral, or

Question

Tell whether 0.1 M solutions of the following salts would be acidic, neutral, or basic: BaCl_2, CuSO_4, (NH_4)2SO_4, ZnCl_2, and NaCN. If the pH of a solution is 6, what are the hydrogen and hydroxide ion concentrations? The pH of a 0.1 M MCI (M is an unknown cation) was found to be 4.7. Write a net ionic equation for the hydrolysis of M^+ and its corresponding equilibrium expression Kb. Calculate the value of Kb. What is the pH of a solution that is 0.20 M HC_2H_3O_2 and 0.40 M NaC_2H_3O2? K_a for acetic acid is 1.8 times 10^-5.

Explanation / Answer

8 )

BaCl2 neutral . is the salt of strong acid and strong base.

CuSO4 it is acidic . it is the salt of weak base and strong acid

(NH4)2SO4 it is acidic . it is the salt of strong acid and weak base

ZnCl2 is the acidic because it is the salt of strong acid and weak base

NaCN is the basic because it is the salt of weak acid and strong base

9)

pH = 6

hydrogen ion concentration = 10^-pH

                                            = 1.0 x 10^-6 M

hydroxide ion concentration = 1.0 x 10^-8 M

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