Question
Asked Nov 4, 2019
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For each of the reactions below, classify as a combination, decomposition, single replacement, or double replacement.

Hg(NO3)2(aq) + 2NaI(aq) ------------------->   HgI2(s) + 2NaNO3(aq)

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Expert Answer

Step 1

The given reaction is to be classified as a combination, decomposition, single replacement, or double replacement-

Hg(NO3)2 (aq) + 2NaI (aq) →   HgI2 (s) + 2NaNO3 (aq)

Step 2

The chemical reactions can be classified into 5 categories-

  1. Combination reaction – In this, two or more substances combine to form a new single substance. The general form of combination reaction is-

A+ B → AB

  1. Decomposition reaction – In this, one substance (compound) is broken down into two or more simpler substances. The general form of decomposition reaction is-

AB → A+ B

  1. Single –replacement reaction – In this type, one element of a compound is replaced by another element, thus forming a new compound. The general form of single-replacement reaction is-

...

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