Question

Масова частка соляної кислоти в шлунковому соці дорівнює 0,55 % (р = 1,008 г/см'). Обчислити молярну концентрацiю еквівалента НСl в шлунковому соці. ​

Answer 1

Calculating Molar Concentration of HCl in Gastric Juice

To calculate the molar concentration of hydrochloric acid (HCl) in gastric juice, we can use the given mass fraction of hydrochloric acid and the molar mass of HCl.

Given: - Mass fraction of hydrochloric acid (w_HCl) = 0.55% - Density of gastric juice (ρ) = 1.008 g/cm³

First, we need to convert the mass fraction to a decimal and then calculate the molar concentration of HCl.

Calculation Steps:

1. Convert Mass Fraction to Decimal: - Mass fraction (w_HCl) = 0.55% - Convert to decimal: 0.55% = 0.55/100 = 0.0055

2. Calculate Molar Concentration: - Molar mass of HCl (M_HCl) = 36.46 g/mol (hydrogen: 1.008 g/mol, chlorine: 35.45 g/mol) - Using the formula: - Molar concentration (C) = (w_HCl * ρ) / (M_HCl * 1000) - Substitute the values: C = (0.0055 * 1.008) / (36.46 * 1000)

3. Solve for Molar Concentration: - Calculate the value of C using the given formula.

Let's calculate the molar concentration of HCl in gastric juice using the provided information.