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In preparing for succession, the senior generation has certain responsibilities. One of these is that the

Trihydroxybenzoic acid (THB) is a not-so-weak acid with an ionization constant:  Ka = 2.1 × 10-2.  Calculate the [H+] and the pH of a 0.050 molar solution of THB

A 0.200 M solution of an acid, HA, has a pH = 3.50.  What is the value of the ionization constant Ka for this acid?

Select the pair of substances in that an acid is listed followed by its conjugate base.  

A 0.200 M solution of an acid, HA, has a pH = 3.50.  What is the value of the ionization constant Ka for this acid?

Which of the following is the expression for the solubility product of copper(II) hydroxide?  

You have 500.0 mL of a buffer solution containing 0.30 M ammonia (NH3) and 0.20 M ammonium chloride (NH4Cl).  What will the pH of this solution be after the addition of 20.0 mL of 1.00 M NaOH solution?  [Kb = 1.8 x 10-5]

The solubility of lead(II) fluoride, PbF2, in pure water is 2.1 × 10‑3 moles per liter.  Cal­culate the value of Ksp for lead(II) fluoride from this data. 

Arsenic acid, H3AsO4, is used industrially to manufacture insecticides. Arsenic acid is a polyprotic acid with K1 = 2.5 × 10–4, K2 = 5.6 × 10–8, and K3 = 3 × 10–13. What is the concentration of the HAsO42– in a solution whose initial arsenic acid concentration was 0.35 M?  

What is the pH of a solution that consists of 0.50 M H2C6H6O6 (ascorbic acid) and 0.75 M NaHC6H6O6 (sodium ascorbate)? For ascorbic acid, Ka = 6.8 × 10–5