To evaluate this
claim, various temperatures of equal amount of water will be use as test
subjects. There will be three different temperatures of water tested: cold
water at five degrees Celsius, room temperature water at twenty- two degrees
Celsius, and hot water at approximately fifty degrees Celsius. All the water
samples will be measured at two-hundred milliliters with a graduated cylinder.
Each of the water sample will be mixed with five grams of espresso- coffee
grounds. For the best accuracy, a scale will be utilize to measure the amount
of espresso- coffee grounds. The coffee grounds will simply be placed in the
water at the same time- avoid stirring or swirling. After sixty seconds of
combining the solute and solvent, observe the solutions.

One thing to
emphasize is the pigment of the solutions. If the pigmentation of the solutions
darkens starting from the cold water to room temperature water and then the
boiling water, then the experiment supports the claim that as the temperature
of water increases, the caffeine concentration increases. If the pigment varies
in any other order among the water temperature, then the experiment refutes the
claim. The intensity of the pigmentation assumes the level of concentration
such that it compares the amount of ratio of combined elements (Sands, 2016).

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Assuming that the
solution is unsaturated, another observation to determine the concentration
level is to observe the remaining coffee grounds after sixty seconds. The more
visible particles of coffee ground convey that there is a lower concentration
of espresso present in the solution, while less or no visible particles of the
coffee grounds convey there is a higher concentration of espresso present in
the solution. Theoretically, when temperature increase, the rate of chemical
reaction increases resulting in more solutes dissolving, thus obtains a higher
concentration level (BBC). If the portion of visible particles of coffee ground
decreases starting from the cold water to room temperature water and then the
boiling water, then the experiment supports the claim that as the temperature
of water increases, the caffeine concentration increases. Otherwise, this
observation of the experiment refutes the claim.