[taniela]

•A 0.8345 g sample of potassium hydrogen phthalate required 38.31 mL of 0.1023 M NaOH to reach the endpoint. What is the concentration (M) of NaOH?

•A 10.00 mL sample of an HCl solution to be used as an acid standard required 28.45 mL of the previously standardized NaOH to reach the endpoint. What is the concentration of the HCl solution?

•A 0.1046 g diprotic organic acid acid required 23.47 mL of 0.1072 M standard KOH to reach the first endpoint. What is the molecular weight of the acid?

[sjb]

•A 0.8345 g sample of potassium hydrogen phthalate required 38.31 mL of 0.1023 M NaOH to reach the endpoint. What is the concentration (M) of NaOH?

Are you sure that's the question? If I have 5 beans, how many beans do I have?

•A 10.00 mL sample of an HCl solution to be used as an acid standard required 28.45 mL of the previously standardized NaOH to reach the endpoint. What is the concentration of the HCl solution?

•A 0.1046 g diprotic organic acid acid required 23.47 mL of 0.1072 M standard KOH to reach the first endpoint. What is the molecular weight of the acid?

Can you write balanced equations (generic, like H₂A for the latter) for these two reactions?