Which of the following is a way to increase reaction rates?Group of answer choicesput the liquid medium into a smaller containeradd more solid particles to the liquid mediumcool the reactants downnone of the above will increase reaction rates

Which of the following tends to increase the rate of a chemical reaction?A.Decreasing the concentration of the reactantsB.Increasing the temperature of the reaction mixtureC.Increasing the amount of solvent usedD.Using larger particles of solid reactants

Consider two reactions, one that is first order and one that is second order. Which best describes the effect on the reaction rates by INCREASING the concentration of all reactants?

Which of the following would cause a decrease in the rate of a chemical reaction? Which of the following would cause a decrease in the rate of a chemical reaction? An increase in the concentration of the reactants. An increase in temperature. An increase in the particle size. The addition of a catalyst

Which would lower the reaction rate?A.Increasing the temperature of the systemB.Increasing the concentration of reactantsC.Raising the value of kD.Decreasing the temperature of the system

Which of the following would speed up the rate of reaction?Decreasing the temperatureUsing powder rather than lumps of reactantDecreasing the concentration of reactantRemoving a catalyst2Which of the following statements about catalysts is not true?They speed up chemical reactionsThey are chemically unchanged by a reactionThey lower the activation energy required for a reactionThey are chemically changed by a reaction3Why are catalysts useful for producing chemicals in industry?They are cheapThey increase the amount of productThey reduce the amount of reactant neededThey lower the amount of activation energy required4In the core practical ‘Investigating the effect of concentration on the rate of reaction between sodium thiosulfate and hydrochloric acid’, what is the dependent variable? Time taken for reaction to completeConcentration of hydrochloric acidTemperatureConcentration of sodium thiosulfate5In this practical, the first trial uses 5 cm3 of sodium thiosulfate solution dissolved in 25 cm3 of water. If the second trial uses 10 cm3 of sodium thiosulfate solution, how much water should be added to make the investigation a fair test? 10 cm350 cm320 cm325 cm36When investigating the rate of reaction, if one variable increases as the other decreases, what is the relationship between the two variables? UncorrelatedPositively correlatedDirectly proportionalInversely proportional