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Zinc is added to a beaker containing hydrochloric acid, and the beaker gets warm. What type of reaction is this?

Answer 1

Owen Ambrose

This is a redox reaction...........that also happens to be an exothermic reaction.

Zinc metal oxidizes to produce zinc ions:

#Zn(s) rarr Zn^(2+) + 2e^-# #(i)#

Dihydrogen gas is produced by REDUCING hydrogen ion:

#2H_3O^(+) + 2e^(-) rarr H_2(g)uarr + H_2O(l)# #(ii)#

For the overall reaction, we simply add #(i)# to #(ii)#

#Zn(s) + 2HCl(aq) rarr ZnCl_2(aq) + H_2(g)uarr#

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Answer 2

Caleb Adams

One instance of a single displacement or substitution reaction is this one.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.