SOLUTION: I'm not sure that I answered this question correctly. It is in two parts: Part A and Part B. First I was given this formula: pH=-logH+ Part A says: If H+=0.00204 mole/liter, find p

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: I'm not sure that I answered this question correctly. It is in two parts: Part A and Part B. First I was given this formula: pH=-logH+ Part A says: If H+=0.00204 mole/liter, find p      Log On


   

Question 1101907: I'm not sure that I answered this question correctly. It is in two parts: Part A and Part B. First I was given this formula: pH=-logH+ Part A says: If H+=0.00204 mole/liter, find pH. Part B says: If pH=3.2, find H+. My answer for A is pH=2.69, and my answer for B is -24.53=H+ Am I right? I have very little faith in my amth problem solving skills, and so if I am wrong, would you explain how to solve this correctly? Thank you!!!
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Part A only.
You could use a scientific or graphing calculator for help.

Hydronium concentration, 0.00204 M

pH=-log%28%280.00204%29%29
-log%28%282.04%2A10%5E%28-3%29%29%29
-%28log%28%282.04%29%29%2Blog%28%2810%5E%28-3%29%29%29%29
-log%28%282.04%29%29%2B3%2A1
-0.30963%2B3
highlight%28pH=2.69%29


For part B, think: Does your answer make sense to you?
Given pH=3.2, what does this mean?
3.2=-log%28%28C%29%29
and your base is 10 for Common Logs
and C is your molarity for hydronium ion concentration.

From that, log%28%28C%29%29=-3.2
10%5E%28-3.2%29=C
which you could use your calculator to get the decimal value for C.