Posted by **Jenny** on Monday, December 8, 2008 at 1:54am.

The hydrogen ion concentration of a substance is related to its acidity and basicity. Because hydrogen ion concentrations vary over a very wide range, logarithms are used to create a compressed pH scale, which is defined by pH=-log(H+)where (H+)is the hydrogen ion concentration, in moles per liter. Pure water has a pH of 7, which means it is neutral. Substances with a pH less than 7 are acidic, and those with a pH greater than 7 are basic. Compute the pH of each substance listed given the indicated hydrogen ion concentration. Assume that log(H+) is written with base 10.

a. Seawater, 4.63x10^-9

b. Vinegar, 9.32x10^-4

Thank you!!

- College Algebra -
**drwls**, Monday, December 8, 2008 at 2:13am
All you have to do is compute the logs to base 10 of 4.63x10^-9 and 9.32x10^-4 , and add a minus sign.

For seawater, the answer is 8.33, which is 9.00 - log 4.63

## Answer this Question

## Related Questions

- Science - make a statement relating hydrogen ion concentration to the acidity ...
- Biology - make a statement relating hydrogen ion concentration to the acidity ...
- Pre Calculs - The pH of a chemical solution is given by the formula pH = -log10...
- Algebra - I need help, I don't understand this at all! I want to use Orange ...
- Chemistry - Given the concentration of either hydrogen ion or hydroxide ion, use...
- math30 - The formula for determining the pH of a solution is pH = -log[H+], ...
- math30 - The formula for determining the pH of a solution is pH = -log[H+], ...
- Chemistry - Acetic acid ionizes in water as follows: CH3COOH + H2O --> CH3COO...
- Chemistry - What happens to the hydroxide ion concentration in aqueous solutions...
- chemistry - pure water has a hydrogen ion concentration of 1 x 10-7 m and a ph ...