increases the rate of a chemical reaction without being consumed or permanently altered in the process. Catalysts work by providing an alternative reaction pathway with a lower activation energy

adding a catalyst increases the rate of reaction byA same reaction pathway and higher activation energyB providing an alternate pathway with lower activation energyC same reaction pathway and lower activation energyD providing an alternate pathway with higher activation

Adding a catalyst increases the reaction rate by...

Catalysts can increase reaction rates by the activation energy, which increases the likelihood of successful collisions.

A catalyst speeds up a chemical reaction as a result of which of the following?Group of answer choices It provides an alternate pathway with a lower activation energy It increases the number of collisions between reacting molecules. It makes the reaction more endothermic.  It makes the reaction more exothermic

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