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Questions and Answers
What is the primary function of a chemical catalyst in a reaction?
What is the primary function of a chemical catalyst in a reaction?
- To alter the equilibrium position of the reaction
- To increase the activation energy required for a reaction
- To initiate a reaction by providing energy
- To lower the activation energy and speed up the reaction (correct)
In terms of solubility, which of these statements is generally true?
In terms of solubility, which of these statements is generally true?
- Polar solutes dissolve well in nonpolar solvents
- Temperature affects the solubility of solids in liquids (correct)
- Gases become more soluble in liquids as temperature increases
- Ionic compounds are insoluble in water
Which of the following statements correctly describes an exothermic reaction?
Which of the following statements correctly describes an exothermic reaction?
- Heat is absorbed from the surroundings
- The reaction never reaches equilibrium
- The products have a higher energy than the reactants
- Energy is released during the reaction (correct)
How does increasing the pressure affect the equilibrium of a gaseous reaction?
How does increasing the pressure affect the equilibrium of a gaseous reaction?
Which type of chemical bond involves the sharing of electron pairs between atoms?
Which type of chemical bond involves the sharing of electron pairs between atoms?
Study Notes
Chemical Catalysts
- Catalysts speed up chemical reactions by providing an alternate reaction pathway with a lower activation energy.
- They do not get consumed in the reaction and can be used repeatedly.
Solubility
- Generally, "like dissolves like" meaning polar solvents dissolve polar solutes and non-polar solvents dissolve non-polar solutes.
Exothermic Reactions
- Exothermic reactions release heat into their surroundings causing a temperature increase in the system.
Pressure and Equilibrium
- Increasing pressure on a gaseous reaction favors the side with fewer moles of gas to relieve the pressure.
Chemical Bonding
- Covalent bonds involve the sharing of electron pairs between atoms.
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Description
Test your knowledge of key concepts in chemistry with this quiz. Dive into topics such as chemical catalysts, solubility, exothermic reactions, and chemical bonds. Perfect for students looking to reinforce their understanding of basic chemistry principles.
