# Calculate the volume of hydrogen obtained by the reaction of zinc with a 200 g sulfuric acid solution with a 15% acid fraction.

January 15, 2021 | education

| To solve this problem, we write down given: m (solution) = 200 g w = 15% or 0.15

Find: the volume of hydrogen.

Decision:

Let’s write down the formula for calculating the mass of a substance.

w = m (substance) / m (solution)

m (substance) = w * m (solution)

m (substance) = 0.15 * 200 = 30 g

Let’s write down the reaction equation.

Zn + H2SO4 = ZnSO4 + H2

Let’s calculate the molar mass of sulfuric acid.

M (H2SO4) = 1 * 2 + 32 + 16 * 4 = 98 g / mol

We write 30 g above sulfuric acid, and 98 g below sulfuric acid.

We write x l above hydrogen, and 22.4 l under hydrogen.

Let’s compose and solve the proportion.

x = 30 * 22.4 / 98 = 6.86 l

Answer: 6.86 L

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.