# PH and molar concentration of hydrogen ion

1.Given the molar concentration of hydrogen ion [H+] = 6.2 x 10 -7, calculate the concentration of hydroxide ion.

2.Given the molar concentration of hydroxide ion [OH -] = 4.6 X 10 -13, calculate the concentration of hydrogen ion.

3. In 1 mL of water there are 3 X 1022 molecules of H2O. How many hydrogen ions are in 1 mL of water (Hint: In 1 billion water molecules, only 2 are ionized).

4. What is the pH of a 0.25 M NaOH solution?

5. A Rolaids tablet contains calcium carbonate, which neutralizes stomach acid. If 44.55 mL of 0.488 M hydrochloric acid is required to neutralize one tablet, how many milligrams of calcium carbonate are in a Rolaids tablet?

CaCO3.(s) + 2 HCl(aq) ® CaCl2(aq) + H2O(l) + CO2(g)

Solution Summary

The solution calculates the molar concentration of hydrogen ion and pH of the solution.

\$2.19
###### This answer includes:
• Plain text
• Cited sources when necessary
• Attached file(s)
• pH.doc
Add to Cart   \$2.19

Yanfang Li, PhD

Rating 4.9/5

Active since 2006

BS, Tianjin University, China
MS, Tianjin University, China
PhD, University of Toledo

Responses 3164

Comments on Yanfang's work:

"hi. the problem generates the least often number 3 times"

"Amazing! Thank you so much! You were very helpful!! :D"

"Excellent solution. Very fast. Thanks"

"thanks so much for your great explanations and showing of work in great detail to actually learn this stuff. Well done."

"Excellent!"