Question

• A sample of calcium carbonate (CaCO3) is reacted with hydrochloric acid (HCl) to produce carbon dioxide gas (CO2). The volume of the CO2 gas is collected over water at a temperature of 25°C and a pressure of 760 mmHg. The vapor pressure of water at 25°C is 23.8 mmHg.

Find the volume of the dry CO2 gas (V1).

(a) V1 = (Vtotal - Vwater) * (Ptotal - Pwater) / (Pdry)
(b) V1 = (Vtotal + Vwater) * (Ptotal + Pwater) / (Pdry)
(c) V1 = (Vtotal * Ptotal) / (Pdry - Pwater)
(d) V1 = (Vtotal * Pdry) / (Ptotal - Pwater)

Answer 1

To calculate the volume of the dry CO2 gas produced in a reaction, we can use the formula V1 = (Vtotal - Vwater) * (Ptotal - Pwater) / (Pdry). Substituting the given values into this formula will give the desired volume.option a)V1 = (Vtotal - Vwater) * (Ptotal - Pwater) / (Pdry)

Step-by-step explanation:

To find the volume of the dry CO2 gas (V1), we can use the formula:

V1 = (Vtotal - Vwater) * (Ptotal - Pwater) / (Pdry)

In this formula, Vtotal is the total volume of the gas collected over water, Vwater is the volume of water, Ptotal is the total pressure of the gas, Pwater is the vapor pressure of water, and Pdry is the pressure of the dry CO2 gas.

Substituting the given values into the formula, we can calculate the volume of the dry CO2 gas (V1).