MYP 8 Science - Chemistry

MYP 8.5.9: Evaluative Practical

Background

Acid rain is produced by industry and car exhaust emissions. It damages both the living and non-living environments.

One effect of acid rain is the deterioration of marble buildings and statues.

Marble is a metamorphic rock formed from limestone by time, heat and pressure.

Limestone is a form of calcium carbonate made by sedimentary deposition of marine animals over millions of years.

The reaction between acid rain and marble can be modelled using hydrochloric acid in the laboratory.

Calcium carbonate reacts with hydrochloric acid according to the equation:

CaCO3(s) + HCl(aq) CaCl2(aq) + CO2(g) + H2O(l)

Student instructions

You are provided with:

  • Hydrochloric acid solution (2 mol dm-3)
  • Marble chips
  • All of the usual laboratory apparatus

You are to identify the variables involved in the reaction between hydrochloric acid and marble chips.

You are to choose one variable to investigate (the independent variable) and another to measure (the dependent variable).

Carry out and write up the experiment.

Assessment

Criterion D - Scientific inquiry

Criterion E - Processing Data

Criterion F - Performance in experiments

Resources

Planning experiments

 


 
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