A chemistry student is investigating how particle size affects the rate of dissolving . In his experiment , he adds a sugar cube , sugar crystals or crushed sugar to each of the three beakers of water , stirs the mixture for 10 seconds and records how long it takes the sugar to dissolve in each beaker . A. Identify the independent and dependent variables in this experiment. How can they be distinguished? B. Identify the feature of the experiment that should be kept constant . C. Explain why it is important to include this feature constant
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Solutions are nothing more than mixtures of different compounds or elements. You encounter solutions every day without even realizing it.
Even the air you breathe-which contains water-is a solution of a liquid and a gas. If you drank a soda today, you actually drank of solution of a gas dissolved in flavored water. If you're wearing a bracelet made of sterling silver, you're wearing a solution of two metals.
In this experiment, you'll be working with a liquid solution, which is one of three types of solutions. The other types are gaseous solutions and solid solutions.
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