Zinc + hydrochloric acid yields zinc chloride and hydrogen gas. (Zinc has a +2 charge).
Label what type of reaction (synthesis, decomposition, single replacement, double replacement or combustion)
Write the balanced chemical equation
How much of each reactant is needed to produce 150 grams of hydrogen gas?
Type of reaction: single replacement
Balanced chemical equation:
Zn + 2HCl -> ZnCl2 + H2
To produce 150 grams of hydrogen gas:
- According to stoichiometry, the balanced equation indicates that 1 mole of zinc (65.39 grams) will react with 2 moles of hydrochloric acid (73.88 grams) to produce 1 mole of hydrogen gas (2.02 grams).
- Therefore, we can calculate the amount of zinc needed:
150 grams H2 x (1 mole H2/2.02 grams) x (1 mole Zn/1 mole H2) x (65.39 grams Zn/1 mole Zn) = 4,811 grams of zinc
- We can also calculate the amount of hydrochloric acid needed:
150 grams H2 x (1 mole H2/2.02 grams) x (2 moles HCl/1 mole H2) x (36.46 grams HCl/1 mole HCl) = 5,382 grams of hydrochloric acid
Note: It is important to use proper safety measures when performing chemical reactions with hazardous materials like hydrochloric acid. Consult a qualified instructor or professional before attempting any reactions.
Is this correct
Yes, your answer is correct.
To determine the type of reaction, we can analyze the reactants and products.
In this case, we have zinc (Zn) and hydrochloric acid (HCl) as the reactants, and the products are zinc chloride (ZnCl2) and hydrogen gas (H2).
Based on the reactants and products involved, this is a single replacement reaction.
The balanced chemical equation for this reaction is:
Zn + 2HCl → ZnCl2 + H2
To calculate the amount of reactants needed to produce 150 grams of hydrogen gas, we need to convert the given mass of the product into the corresponding mass of the reactant using stoichiometry.
1. Calculate the molar mass of hydrogen gas (H2) by summing the atomic masses of hydrogen (H):
H2: 2(1.008 g/mol) = 2.016 g/mol
2. Convert the mass of hydrogen gas (H2) into moles using the molar mass:
Moles of H2 = Mass of H2 / Molar mass of H2
Moles of H2 = 150 g / 2.016 g/mol ≈ 74.4 mol
3. From the balanced equation, we can see that the mole ratio between hydrogen gas (H2) and zinc (Zn) is 1:1. Therefore, the number of moles of zinc (Zn) required will also be approximately 74.4 mol.
4. Calculate the mass of zinc (Zn) required using its molar mass (65.38 g/mol):
Mass of Zn = Moles of Zn × Molar mass of Zn
Mass of Zn = 74.4 mol × 65.38 g/mol ≈ 4863 g
Therefore, approximately 4863 grams of zinc (Zn) and 150 grams of hydrochloric acid (HCl) are needed to produce 150 grams of hydrogen gas (H2) in this reaction.