Is My pH Calculation for NaOH Correct?

[omni]

i need to Calculate the pH of 1x10^-2 NaOH

so i did like this: [OH-]=10^-2

POH=-log[OH-]=-log[10^-2]=2

and if i work with the Formula :pH+POH=14 so i will get pH+2=14

so the for the 1x10^-2 NaOH the ph=12 do i correct?

thnaks.

 

[Fightfish]

Yes, assuming its temperature is around room temperature.

 

[Borek]

Water ion product.

pH + pOH = 14 works perfectly well for 25 deg. Depending on the required accuracy it may be acceptable or may be not acceptable for other temperatures.

 

[omni]

thanks to both of you about your answer.

and yes i speak about 25c.

i need help to Calculate the pH of 1x10^-5 of HNO3

to Calculate base as i showed here is the same way to Calculate acid like is ask now?

thanks.

 

[omni]

is it possible that the ph of HNO3 is 5 ?

 

[Borek]

Yes, you can assume HNO₃ is a strong acid, 100% dissociated.

 

[NEILS BOHR]

yes it is possible...