91Ó°ÊÓ

A solution is prepared by dissolving \(2.40 \mathrm{~g}\) of \(\mathrm{Mg}(\mathrm{OH})_{2}\) in enough water to get \(4.00 \mathrm{~L}\) of solution. What are the \(\mathrm{OH}^{-}\) and \(\mathrm{H}_{3} \mathrm{O}^{+}\) molar concentrations? (Hint: You need to calculate the molar mass of \(\mathrm{Mg}(\mathrm{OH})_{2}\).)

A solution is prepared by dissolving \(2.00\) moles of \(\mathrm{HNO}_{3}\) in enough water to get \(800.0 \mathrm{~mL}\) of solution. What are the \(\mathrm{H}_{3} \mathrm{O}^{+}\) and the \(\mathrm{OH}\) molar concentrations?

A solution has an \(\mathrm{OH}\) concentration of \(10^{-11} \mathrm{M}\). (a) Is this solution basic or acidic? Explain how you know. (b) Without using a calculator, explain how you could quickly determine the \(\mathrm{H}_{3} \mathrm{O}\) concentration of this solution. What is that concentration?

What is a base-10 logarithm?

Without using a calculator, what is the base- 10 logarithm of \(10^{-34}\) ?

Without using a calculator, what is the base-10 logarithm of \(10^{13}\) ?

Without using a calculator, what is the base- 10 logarithm of \(10^{0}\) ? Of 1?

The base- 10 logarithm of 60 is a number: (a) Between \(-2\) and \(-1\) (b) Between \(-1\) and 0 (c) Between 0 and 1 (d) Between 1 and 2 (e) Between 2 and 3

The base-10 logarithm of \(0.73\) is a number: (a) Between \(-2\) and \(-1\) (b) Between \(-1\) and 0 (c) Between 0 and 1 (d) Between 1 and 2 (e) Between 2 and 3

True or false? As a solution's acidity increases, its pH decreases.