How the they get mass and mole

Question

How the they get mass and mole

Asked on March 29, 2026Chemistry

This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.

Accepted Answer · 2026-03-29T10:39:32.572Z

The mass of potassium hydrogen phthalate (KHP) was obtained by weighing it directly using a balance. This is a standard procedure for preparing a primary standard solution. The moles of KHP were then calculated using the measured mass of KHP and its molar mass. The molar mass of KHP (chemical formula $\text{KC}_8\text{H}_5\text{O}_4$) is $204.24 \text{ g/mol}$. The formula used for calculating moles is: $$ \text{Moles} = \frac{\text{Mass (g)}}{\text{Molar Mass (g/mol)}} $$ For example, in Trial 1: Mass of KHP: $0.21900 \text{ g}$ Molar Mass of KHP: $204.24 \text{ g/mol}$ $$ \text{Moles of KHP (Trial 1)} = \frac{0.21900 \text{ g}}{204.24 \text{ g/mol}} = \boxed{0.00107 \text{ mol}} $$

Accepted Answer · 2026-03-29T10:39:32.572Z

The mass of potassium hydrogen phthalate (KHP) was obtained by weighing it directly using a balance. This is a standard procedure for preparing a primary standard solution. The moles of KHP were then calculated using the measured mass of KHP and its molar mass. The molar mass of KHP (chemical formula $\text{KC}_8\text{H}_5\text{O}_4$) is $204.24 \text{ g/mol}$. The formula used for calculating moles is: $$ \text{Moles} = \frac{\text{Mass (g)}}{\text{Molar Mass (g/mol)}} $$ For example, in Trial 1: Mass of KHP: $0.21900 \text{ g}$ Molar Mass of KHP: $204.24 \text{ g/mol}$ $$ \text{Moles of KHP (Trial 1)} = \frac{0.21900 \text{ g}}{204.24 \text{ g/mol}} = \boxed{0.00107 \text{ mol}} $$