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In an equation the reactants are the on the left of the arrow, and the products are on the right. For example if you had the following equation:

2H2 + O2 => 2H2O

2H and O will be the reactants and H2O is the product.

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15y ago
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11y ago

The most basic tool when figuring out a chemical equation is that the number of atoms of every individual element that you start with, must equal your final result; if the reactants contain 10 oxygen atoms, the products will also contain 10 oxygen atoms, and so forth. Beyond that it is good to be familiar with the common radicals and their charges, and to understand that metals tend to combine with nonmetals. The more you know about chemistry in general, the more easily you will be able to determine the products of a given chemical reaction.

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11y ago

The reactants are at the left of the chemical reaction, the products at right.

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7y ago

Reactants are placed to the left.

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Q: When looking at a chemical reaction how do you know what the reactants and products are?
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When looking at a chemical reaction how do you know where the reactants and where the products are?

The convention is that reactants are on the left and products are on the right, but the direction of the arrow should also tell you: it points toward the products.


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