# chemistry

posted by .

What are the concentrations of [H+] and [OH-] in each of the following. Determine the pH and pOH for each solution.
A. 1.25 M HCl
B. 0.25 M NaOH
C. 0.035 M Ca(OH)2
D. 0.50 M HNO3

I know how to do the pH and pOH I just do not know how to figure out the both concentrations.

• chemistry -

1.25 M HCl = 1.25 M H^+; therefore,
Kw = 1 x 10^-14 = (H^+)(OH^-). You know Kw and (H^+). Calculate OH^-

NaOH = 0.25 M = OH^-
Kw = (H^+)(OH^-). YOu know Kw and OH, calculate H^+.

## Similar Questions

1. ### ap chemistry

please explain titration problems. I'm a total noob at this and am trying to answer some prelab questions. Examples: 1. How many mL of a 0.800 M NaOH solution is needed to just neutralize 40 mL of a 0.600 M HCl solution?
2. ### Chemistry

What is the pH of the solution created by combining 12.20 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)?
3. ### college chemistry

You are given solutions of HCl and NaOH and must determine their concentrations. You use 38 mL of NaOH to titrate 100 mL of HCl and 23.2 mL of NaOH to titrate 50 mL of 0.0782 M H2SO4. Find the unknown concentrations.
4. ### college

1) You are given solutions of HCl and NaOH and must determine their concentrations. You use 37.0mL of NaOH to titrate 100mL of HCl and 13.6 mL of NaOH to titrate 50.0mL of 0.0782 M H2SO4. Find the unknown concentrations. Molarity of …
5. ### Chemistry

1) You are given solutions of HCl and NaOH and must determine their concentrations. You use 37.0mL of NaOH to titrate 100mL of HCl and 13.6 mL of NaOH to titrate 50.0mL of 0.0782 M H2SO4. Find the unknown concentrations. Molarity of …
6. ### Chemistry

Calculate the volume of 2.503 N HNO3 added to 100 mL of HCl in order to prepare 1.1251 N acid solution from the following data: 58.96 mL NaOH will neutralize 2.521g of potassium tetroxalate and 45.57 mL of HCl will neutralize 53.0 …
7. ### chemistry

A student prepares a solution of hydrochloric acid that is approximately 0.1 M and wanted to determine its precise concentration. A 25.00 mL portion of the HCl solution is transferred to a flask, and after a few drops of indicator …
8. ### ap chemistry

The weak acid HQ has pKa of 4.89. 1)Calculate the [H3O+] of .035 M HQ. 2)Calculate the (OH-) of 0.500 M HQ ....Am I correct?
9. ### Science ap chem

For which of the following solutions must we consider the ionization of water when calculating the pH or pOH?
10. ### chemistry

(7 points) 1. The reaction that you just witnessed in while doing your titration was: HCl + NaOH  H2O + NaCl. This equation is balanced. Your unknown solutions contained HCl solutions of unknown concentrations, and your titrant …

More Similar Questions