Rainy07
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Gemma is designing an investigation about the factors that affect reaction rate. She decides to experiment with the reaction between magnesium metal and hydrochloric acid. This reaction produces magnesium chloride and bubbles of hydrogen gas. She wants to test the following hypothesis:

Hypothesis: If the acid concentration is increased then the reaction rate will increase

She will place hydrochloric acid with different concentrations into five conical flasks. She will then add a single strip of magnesium metal to each one and measure the amount of hydrogen gas produced.

The reaction between magnesium and hydrochloric acid is exothermic, so it releases heat. This could be a problem for Gemma's investigation because temperature also affects reaction rate. The rise in temperature could therefore influence the outcome in addition to the independent variable, concentration.

Identify one way that Gemma could deal with this problem to improve the validity of her experiment.
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Hellllpppp
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So you need to think of a way to produce less heat or to deal with the heat produced
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Rainy07
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(Original post by Hellllpppp)
So you need to think of a way to produce less heat or to deal with the heat produced
How? Using ice bucket?
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Hellllpppp
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(Original post by Rainy07)
How? Using ice bucket?
Maybe that was my first thought but I don't know if it would effect the temperature too much, you could also use less reactants so less heat is produced.
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factoryman942
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Water has a high specific heat capacity, so it takes a lot of energy to raise its temperature - so if you were to use a large volume of solution, the heat energy from the reaction should be absorbed without raising the temperature as much.
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