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What is the molarity of ZnCl2 that forms when 25.0 g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 275 mL. Zn(s) + CuCl2(aq) → ZnCl2(aq) + Cu(s)
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Ch.5 - Introduction to Solutions and Aqueous Solutions
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217
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TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving118
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds131
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions82
- Ch.6 - Gases114
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements90
- Ch.10 - Chemical Bonding I: The Lewis Model89
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials47
- Ch.14 - Solutions90
- Ch.15 - Chemical Kinetics115
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases136
- Ch.18 - Aqueous Ionic Equilibrium153
- Ch.19 - Free Energy & Thermodynamics93
- Ch.20 - Electrochemistry106
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry140
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Tro 6th EditionCh.5 - Introduction to Solutions and Aqueous SolutionsProblema 42
Tro 6th EditionCh.5 - Introduction to Solutions and Aqueous SolutionsProblema 42Capitolo 5, Problema 42
Consider the reaction: Li2S(aq) + Co(NO3)2(aq) → 2 LiNO3(aq) + CoS(s) What volume of 0.150 M Li2S solution is required to completely react with 225 mL of 0.175 M Co(NO3)2?
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Identify the balanced chemical equation: Li_2S(aq) + Co(NO_3)_2(aq) \(\rightarrow\) 2 LiNO_3(aq) + CoS(s).
Determine the stoichiometry of the reaction: 1 mole of Li_2S reacts with 1 mole of Co(NO_3)_2.
Calculate the moles of Co(NO_3)_2 using its concentration and volume: \(\text{moles of Co(NO}\)_3\(\text{)}\)_2 = 0.175 \(\text{ M}\) \(\times\) 0.225 \(\text{ L}\).
Use the stoichiometry of the reaction to find the moles of Li_2S needed: \(\text{moles of Li}\)_2\(\text{S}\) = \(\text{moles of Co(NO}\)_3\(\text{)}\)_2.
Calculate the volume of 0.150 M Li_2S solution required using the moles of Li_2S: \(\text{Volume of Li}\)_2\(\text{S}\) = \(\frac{\text{moles of Li}\)_2\(\text{S}\)}{0.150 \(\text{ M}\)}.
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Stoichiometry
Stoichiometry is the calculation of reactants and products in chemical reactions based on the balanced equation. It involves using mole ratios derived from the coefficients of the balanced equation to determine how much of one substance is needed to react with another. In this case, understanding the stoichiometric relationship between Li<sub>2</sub>S and Co(NO<sub>3</sub>)<sub>2</sub> is essential to find the required volume of Li<sub>2</sub>S solution.
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01:16
Stoichiometry Concept
Molarity
Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution. It is crucial for determining how much of a substance is present in a given volume of solution. In this problem, the molarity of both Li<sub>2</sub>S and Co(NO<sub>3</sub>)<sub>2</sub> solutions is provided, which allows for the calculation of the moles of each reactant involved in the reaction.
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01:13Molarity
Limiting Reactant
The limiting reactant is the substance that is completely consumed first in a chemical reaction, thus determining the maximum amount of product that can be formed. Identifying the limiting reactant is essential for calculating how much of the other reactants are needed. In this scenario, determining whether Li<sub>2</sub>S or Co(NO<sub>3</sub>)<sub>2</sub> is the limiting reactant will influence the volume of Li<sub>2</sub>S solution required for the reaction.
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01:30Limiting Reagent Concept
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