A compound that can speed up the rate of a reaction without being consumed by the reaction is a(n)Select answer from the options belowproductintermediaryreactantcatalyst

What is the term for a substance that can increase the rate of a reaction without becoming changed?Group of answer choicescatalystreactantproductelectrolyte

Which of the following would speed up the rate of reaction?Removing a catalystDecreasing the temperatureDecreasing the concentration of reactantUsing powder rather than lumps of reactant2Which of the following statements about catalysts is not true?They speed up chemical reactionsThey lower the activation energy required for a reactionThey are chemically unchanged by a reactionThey are chemically changed by a reaction3Why are catalysts useful for producing chemicals in industry?They increase the amount of productThey reduce the amount of reactant neededThey are cheapThey 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 acidConcentration of sodium thiosulfateTemperature5In 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? 25 cm310 cm320 cm350 cm36When investigating the rate of reaction, if one variable increases as the other decreases, what is the relationship between the two variables? Directly proportionalInversely proportionalUncorrelatedPositively correlated

In reaction 1, 12g of reactants were converted to products in 30 seconds. In reaction 2, 200g of reactants were converted to products in 8 minutes. Which reaction happened at the faster rate?

Below are the elementary steps that make-up the reaction mechanism for the following reaction.F2 + 2 NO2 → 2 NO2FStep 1: F2 + 2 NO2 → NO2F + F + NO2 (slow)Step 2: F + NO2 → NO2F (very fast)Which is the rate determining step?Group of answer choicesStep 1Step 2

A chemical agent that selectively increases the rate of a reaction without being consumed by the reaction.Group of answer choicescatalystcofactorcoenzymeproteinphosphorylated intermediateNext