Calculate the pH of a solution obtained by mixing 30ml of 0.75M CH3COOH with 15 ml of 1.5M NaOH. The Ka of CH3COOH is 1.8x10^-5

I have attempted this problem multiple times and I keep getting a pH of 4.74 which is incorrect. The correct pH is 9.22. Can anyone please show me how to get this answer??
Thank you!!

Question

Calculate the pH of a solution obtained by mixing 30ml of 0.75M CH3COOH with 15 ml of 1.5M NaOH. The Ka of CH3COOH is 1.8x10^-5

I have attempted this problem multiple times and I keep getting a pH of 4.74 which is incorrect. The correct pH is 9.22. Can anyone please show me how to get this answer??
Thank you!!

vincent-lyon.fr · Answer

tip 1. write down the equation of neutralisation
tip 2. work out amounts after reaction
tip 3. what is the nature of the solution you end up with?

anonymous · Answer

thats what i did, but I kept geting 4.74 instead of 9.22

vincent-lyon.fr · Answer

Please, write down you calculations, so that we can point at your mistake.