Of the following solutions, which has the greatest buttering capacity? A) 0.521 M HC2H302 and 0.217 M NaC2H302 3) 0.365M HC2H302 and 0.497 M NaC2H3O2 (9) 0.121 M HC2H302 and 0.116 M NaC2H3O2 D) 0.821 M HC2H302 and 0.713 M NaC2H302

Not sure what I’m doing wrong but I’m stuck here

To best accurately determine the molarity of a base, a scientist would need the following: An Erlenmeyer flask, a weighed solid primary standard acid, and NaOH A buret, a weighed solid monobasic base, and an indicator A buret, a weighed solid primary standard acid, and an indicator A buret, a weighed solid primary standard acid, and NaOH A graduated cylinder, a weighed solid primary standard acid, and an indicator

An HCl solution has a concentration of 0.09714 M. Then 10.00 mL of this solution was then diluted to 250.00 mL in a volumetric flask. The diluted solution was then used to titrate 250.0 mL of a saturated AgOH solution using methyl orange indicator to reach the endpoint. 1. What is the concentration of the diluted HCl solution?   2. If 7.93 mL of the diluted HCl solution was required to reach the endpoint, what is the concentration of OH− in solution?   3. What is the concentration of Ag+ in solution?