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d 25 ml of 0.15 M HCL solution be added to 250 mL of buffer solution containing 0.25M HF Ka-7.1 x 10, and 0.40 M NaF at a pH of 3.15 what is the new pH?

Should 25 ml of 0.15 M HCL solution be added to 250 mL of buffer solution containing 0.25M HF Ka-7.1 x 10, and 0.40 M NaF at a pH of 3.15 what is the new pH?

1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of Na...

For the formula pH=pka + log(base/acid) Which would be the base and which would be the acid? Thanks.

Thank you so much!

Would HCL be put on the bottom with HF because it's an acid also?

For #1, would I have to multiply 500 mL to 0.050 moles and 0.20 moles? Or can I just set it up like this below and solve for it? pH=4.75 + log [0.20]/[0.050]