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Worksheet 2C: Stoichiometry

  • Page ID
    36938
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    Q1.

    \(Na_2SiO_3 (s) + 8 HF_{(aq)} \rightarrow H_2SiF_{6\; (aq)} + 2 NaF_{(aq)} + 3 H_2O_{(l)}\)

    1. How many moles of \(HF\) are needed to react with 0.300 mol of \(Na_2SiO_3\)?
    2. How many grams of \(NaF\) form when 0.500 mol of \(HF\) reacts with excess \(Na_2SiO_3\)?
    3. How many grams of \(Na)2SiO_3\) can react with 0.800 g of \(HF\)?

    Q2.

    \(C_6H_{12}O_{6\; (aq)} \rightarrow 2 C_2H_5OH_{(aq)} + 2 CO_{2\; (g)}\)

    1. How many moles of \(CO_2\) are produced when 0.400 mol of \(C_6H_{12}O_6\) reacts in this fashion?
    2. How many grams of \(C_6H_{12}O_6\) are needed to form 7.50 g of \(C_2H_5OH\)?
    3. How many grams of \(CO_2\) form when 7.50 g of \(C_2H_5OH\) are produced?

    Q3.

    \(Fe_2O_{3\; (s)} + CO_{(g)} \rightarrow Fe_{(s)} + CO_{2\; (g)} \) (unbalanced!)

    1. Calculate the number of grams of \(CO\) that can react with 0.150 kg of \(Fe_2O_3\)
    2. Calculate the number of grams of \(Fe\) and the number of grams of \(CO_2\) formed when 0.150 kg of \(Fe_2O_3\) reacts

    Q4.

    \(2 NaOH_{(s)} + CO_{2\;(g)} \rightarrow Na_2CO_{3\; (s)} + H_2O_{(l)}\)

    1. Which reagent is the limiting reactant when 1.85 mol NaOH and 1.00 mol \(CO_2\) are allowed to react?
    2. How many moles of \(Na_2CO_3\) can be produced?

    Q5.

    \(C_6H_6 + Br_2 \rightarrow C_6H_5Br + HBr\)

    1. What is the theoretical yield of \(C_6H_5Br\) in this reaction when 30.0 g of \(C_6H_6\) reacts with 65.0 g of \(Br_2\)?
    2. If the actual yield of \(C_6H_5Br\) was 56.7 g, what is the percent yield?

    Worksheet 2C: Stoichiometry is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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