# chem

posted by .

this is my question
Calculate the hydronium ion consentration and the hydroxide concentration in blood in which the PH is 7.3.

I don't have invlog on my calculator so I hit log(7.3)= .863 for hydronium. Is this dumb for me to do?

That is dumb for you to do.

Get a calc that has an INV key. Mine costs eight dollars.

concentration= invlog (-7.3)= 5.01?E-08

Do you have a 2nd key, and a log key?

normally, 2nd Log is same as INVLOG

yes when I press 2nd then log I get 10^, is this correct?

In order to get antilog on mine I punch the 10x key. And a pH of 7.3 is hydroniuim of 5.01E-8.

ok I got that part. now how can I find Hydroxide concentration from this?

Two ways.
#1. (H^+)(OH^-) = 1 x 10^-14.
You know (H^+).

#2. pH + pOH = pKw = 14
You know pH, so subtract from 14 to get pOH. Then pOH = -log(OH^-).

PH + pOH = pKw =14
7.3 + pOH =pKw =14
7.3 - 14 = 6.7
pOH = -log(OH^-)
6.7 = -log(1.00 x 10^-14)
pOH = 1.92 x 10^6? I'm stuck

PH + pOH = pKw =14
7.3 + pOH =pKw =14
7.3 - 14 = 6.7
pOH = -log(OH^-) OK to here

6.7 = -log(1.00 x 10^-14)
pOH = 1.92 x 10^6? I'm stuck

pOH = -log(OH^-)
6.70 = -log(OH^-)
-6.70 = log(OH^-)
1.996 x 10^-7 = round to
2 x 10^-7 = (OH^-)

## Similar Questions

1. ### chemistry

Calculate the hydronium ion consentration and the hydroxide concentration in blood in which the PH is 7.3. Hydronium = [H3O+] = 10-pH or [H3O+] = antilog (- pH) and I got 1.00 x 10^7.3 for both concentrations is this correct?
2. ### Chemistry

this makes absolutley no sense I plug all this into my calculator but I get different results. The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. [H3O+] = …
3. ### chemistry

15029 What is the hydronium ion (aka H+) concentration for a solution that is 2.50 x 10-4M in hydroxide. what do i do here?
4. ### Chemistry

1)How many joules are needed to heat 8.50 grams of ice from -10.0 degrees to 25.0 degrees?
5. ### Chem Help

If the hydronium ion concentration of a aqueous solution at 25 degrees celcius is 5*10^-6 M, what is the hydroxide ion concentration
6. ### chemistry

what are the hydronium-ion and the hydroxide ion concentration of a solution at 25 C that is 0.0050 M strontium hydroxide, Sr(OH)2?
7. ### Chemistry

The pH of a solution is 1. Which of the following statements are also true for the solution?
8. ### Chemistry

A solution has a hydroxide-ion concentration of 7.48X10-5 M. What is it's hydronium-ion centration?
9. ### chemistry

Calculate the hydronium ion concentration and pH in a 0.037 M solution of sodium formate, NaHCO2. hydronium ion concentration i don't understand these
10. ### Chemistry

Calculate the hydronium ion concentration of blood which has a pH of 7.24. 7.17 x 10-4 M 5.75 x 10-8 M 1.15 x 10-7 M 0.86 M none of the above I had chose 1.15*10^-7 by doing the log equation -log(1.15...) and I but it goether with …

More Similar Questions