The effect of temperature on the reaction rate between marble chips and hydrochloric acid
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... changes that I made after the preliminary. I was careful not to start timing as I poured in the acid. This is because the gas released wouldn“t be produced by reaction but the displacement of air by the acid.
To keep this experiment a fair one, I had to keep all variables apart from temperature the same. The variables were:
Amounts of materials used Surface area of marble chips Concentration of acid
I made sure I used the same mass of marble chips each time and the same volume of hydrochloric acid too. I used the same concentration of acid every time so the concentration is the same. To keep the surface area of the marble chips the same, I made sure all the marble chips I used were large and therefore h ...
