A buffer is prepared containing 0.300 molar boric acid and 0.500 molar dihydrogen borate. What is its pH? (pKa = 9. 27)

What is the pH of a buffer that contains 0.5 M ammonia(base) and 0.8 M ammonium chloride(acid)? (pKa = 9.248).

Lactic acid (CH3CHOHCOOH) is found in sour milk and in muscles after activity. (Ka for lactic acid = 1.4 × 10-4.)If 2.25 g of CH3CHOHCOONa, sodium lactate, is added to 500 mL of 0.130 M lactic acid,What is the pH of the resulting buffer solution?

This question concerns part 1 of this lab.You need to make a buffer solution by mixing both a weak acid and its conjugate base in the right proportions to achieve the desired pH.Your desired target pH is 5.40. You have been provided with 5.00 mL of 0.100 M acetic acid solution.How many moles of sodium acetate do you need to add to this solution to obtain a buffer solution at the desired pH? The pKa of acetic acid is 4.74.

A solution is prepared by adding 500 mL of 0.300 mol/L of carbonic acid solution and 500 mL of 0.150 mol/L sodium hydrogen carbonate solution. The Ka value for carbonic acid is 4.4 x 10-7. What is the pH of the resultant buffer solution?

The pH of a buffer solution prepared by using 0.04 M of C6H5COONa and 0.02 M C6H5COOHsolutions is(Note: Ka of acid is 6.4 × 10−5 at 25°C)A. 3.89B. 4.19C. 4.49D. 6.19