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22. Which of the following is/are expected to affect the rate of a chemical reaction? 1....
Which of the following changes will affect the rate constant of a reaction? 1. Increasing or decreasing the reaction temperature. 2. Adding a catalyst. 3. Increasing or decreasing the reactant concentrations. Choices: a. 1 only b. 2 only c. 3 only d. 1 and 2 e. 1, 2, and 3
1. which of the factors that affect chemical reaction rates explains why milk spoils slower when stored in the refrigerator? a. ctalyst b. temperature c. Concentration d. Surface area 2, The arte of a chemical increases with increasing concentrations of reactants because reactant molecules move faster when they are more concentrated a. True b. False
10. (5 pts) Consider the following reaction in equilibrium H2(g) + Brz(g) → 2 HBr (g) AH = + 68 kJ How will each of the following changes affect the equilibrium concentrations of each chemical: a) addition of HBr(g) b) increasing temperature c) increasing pressure d) decreasing volume of the reacting vessel at constant temperature. e) addition of bromine f) addition of argon g) addition of catalyst
QUESTION 1 Consider the following chemical reaction: Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Which of the following changes will increase the rate of this reaction? Decreasing the concentration of HCI. O Adding more MgCl2. O Increasing the pressure of H2. Decreasing the temperature. Adding a catalyst. N QUESTION 2
QUESTION 1 Consider the following chemical reaction: Mg(s) + 2HCl(aq) – MgCl2(aq) + H2(g) Which of the following changes will decrease the rate of this reaction? Adding more solid Mg. Adding a catalyst. Decreasing the pressure of H2. Decreasing the temperature. Increasing the concentration of HCI.
QUESTION 1 Consider the following chemical reaction: Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Which of the following changes will decrease the rate of this reaction? Adding more solid Mg. Adding a catalyst. Decreasing the pressure of H2. Decreasing the temperature. Increasing the concentration of HCI.
2) in a catalyzed chemical reaction, one function of a catalyst is to A) increase the number of successful reactant collisions. B) decrease the concentration of reactants. change the equilibrium concentrations of the products and react D) increase the energy given off during the reaction E) increase the temperature at which the reaction is carried out. 3) Refrigerating perishable foods affects biochemical reactions by A) increasing concentrations of antioxidants. B) removing bacteria. C) decreasing the rate of reactions affecting spoilage....
10. (5 pts) Consider the following reaction in equilibrium H2(g) + Br(g) → 2 HBr (g) AH = +68 kJ How will each of the following changes affect the equilibrium concentrations of each chemical: a) addition of HBr(s) b) increasing temperature and timor od moment c) increasing pressure d) decreasing volume of the reacting vessel at constant temperature. e) addition of bromine f) addition of argon neonatology g) addition of catalyst bobb s oods Laboratorio
1. A catalyst affects the rate of a chemical reaction by a. providing an alternate reaction pathway with a lower activation energy. b. decreasing the energy difference between the reactants and products. c. increasing the number of collisions between the reactants. d. increasing the average kinetic energy of the reactants.
For the general reaction A+BC ABC how would each event affect the rate of the reaction? Increase reaction rate Decrease reaction rate Answer Bank increasing the concentration of A decreasing the concentration of BC increasing the temperature adding a catalyst