Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

3. Chemical Reactions

Stoichiometry

General Chemistry

3. Chemical Reactions

Stoichiometry

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Multiple Choice

According to the following reaction, what volume of 0.244 M KCl solution is required to react exactly with 50.0 mL of 0.210 M Pb(NO3)2 solution?2 KCl(aq) + Pb(NO3)2(aq) → PbCl2(s) + 2 KNO3(aq)

43.0 mL

86.0 mL

50.0 mL

21.5 mL

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Verified step by step guidance

First, identify the balanced chemical equation: 2 KCl(aq) + Pb(NO3)2(aq) → PbCl2(s) + 2 KNO3(aq). This tells us that 2 moles of KCl react with 1 mole of Pb(NO3)2.

Calculate the moles of Pb(NO3)2 present in the solution using the formula: \( \text{moles} = \text{concentration} \times \text{volume} \). Convert the volume from mL to L by dividing by 1000.

Using the stoichiometry from the balanced equation, determine the moles of KCl required. Since 2 moles of KCl react with 1 mole of Pb(NO3)2, multiply the moles of Pb(NO3)2 by 2 to find the moles of KCl needed.

Calculate the volume of KCl solution required using the formula: \( \text{volume} = \frac{\text{moles}}{\text{concentration}} \). Use the moles of KCl calculated in the previous step and the given concentration of KCl solution.

Convert the volume from liters to milliliters by multiplying by 1000, and compare the calculated volume to the provided answer choices to determine the correct answer.