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madam [21]
3 years ago
7

Which statement describes a chemical reaction at equilibrium?(1) The products are completely consumed in the reaction.

Chemistry
2 answers:
Mice21 [21]3 years ago
8 0
The statement that describes a chemical reaction at equilibrium is 4)<span> </span><span>The concentrations of the products and reactants are constant.</span><span>
</span>
emmainna [20.7K]3 years ago
6 0

Answer: Option (3) is the correct answer.

Explanation:

An equilibrium reaction is a reaction in which the concentration of both reactant and products is the same.

That is, the rate of forward reaction is equal to the rate of backward reaction.

For example, 2SO_{2}(g) + O_{2}(g) \rightleftharpoons 2SO_{3}(g)

Thus, we can conclude that out of the given options, statement the concentrations of the products and reactants are equal, describes a chemical reaction at equilibrium.

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It is important to use the same balance throughout the entire experiment since the calibration of each balance is not the same and changing balances could result in a systematic error.

There are three types of errors that could affect the results of the experiment. The effect of random or indeterminate errors is hard to predict, its effect on the results of the experiment could be different every time. The second type of error is the systematic or determinate error, which causes a shift in results in a specific direction. The last type of error in an experiment is human error.

The type of error that could be related to the use of different balances throughout the experiment is the systematic error. Instruments could be a source of error especially if they are poorly calibrated. Also, analytical balances are calibrated differently which may result in inaccuracy in the weighing of chemicals.

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