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What is a catalyst?

A catalyst is something that changes the rate of a chemical reaction, without being used up during it. A catalyst provides a different reaction pathway, which requires a lower activation energy than the orig...
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Answered by Ryan F. • Chemistry tutor
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How would you expect calcium carbonate to react with hydrochloric acid?

The chemical equation is as follows: CaCO 3(s) +2HCl (aq) --->CO 2(g) +H 2 O(l)+CaCl 2(aq) The general formula for an acid reacting with a carbonate is: Carbonate+Acid--->Carbon dioxide+Water+Salt Thes...
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Answered by Annie H. • Chemistry tutor
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Explain why DNA replication is considered semi-conservative.

DNA requires one template strand that is conserved, in order for the nitrogenous bases to order themselves correctly in the new polynucleotide chain. This relies on the complimentary base pairing C-G and A-T...
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How do catalysts speed up the rate of a reaction?

A catalyst increases the rate of the reaction because: They provide an alternative energy pathway that has a lower activation energy This means that more particles have the activation energy required for the...
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Answered by Vanessa O. • Chemistry tutor
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Iron can be extracted from iron ore by reaction with carbon at very high temperature in a blast furnace. In this process Fe2O3 is reduced to Fe. Explain what is meant by the term reduction.

Reduction: loss of oxygen (or gain of electrons)
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Answered by Mark T. • Chemistry tutor
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