Question

calculate the pOH of 0.3m NaOH​

Answer 1

Answer:

(OH ^- )= 0.2 m = 2×10^-1 m

pOH=-log( OH^-)

= - log ( 2×10^-1)

= 0.03010

pH= 14- 0.03010

= 13.9699

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Answer 2

Answer:

You can calculate pH if you know the concentration of the NaOH

Explanation:

You will need to know the molarity of the NaOH. Let's assume the solution is 0.1M. NaOH is a strong base, so this will produce 0.1mol/L of OH ions in solution. This will produce a pH of 13.

You will need to take the negative log of 0.1 to find the pOH. This will work out to be 1.

Since pH + pOH = 14

We can calculate the pH to be 13.

This assumption we made about the base can only be used for strong bases which dissociate completely in water.