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?

3 answers

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.

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