Assume that charlee has two separate beakers containing the same amount of water in each with the same temperature. she adds one spoonful of the same solute to each beaker and stirs them at the same speed. in one beaker, the rate of dissolving of the solute is significantly faster than the other. elaborate on possible reason why a) the beaker that dissolved the solute slower already has some solute in it. b) the instrument used to stir was much bigger than the instrument used to stir the other. c) the solutes placed in the beaker were put in at different rates. d) the water was much warmer in the beaker that dissolved it faster.

Option (A) is the correct answer.

Explanation:

When solute dissolved faster in one beaker then it means the rate of dissolution is faster as no other substance except the solute is present in the solution.

Whereas, in another beaker solute dissolved slowly therefore, rate of dissolution of solute is slow as it might be possible that some other substances including the solute are present in the solvent.

As a result, rate of dissolution has decreased into the water (solvent).

Since it is given that temperature was same in both the beakers. Thus, there is possibility that one of the beaker already had some solute.

Hence, we can conclude that the beaker that dissolved the solute slower already has some solute in it.