When metals react with acids, it causes a temperature change. Plan an investigation to find which metal causes the greatest temperature change, using the following equipment:A thermometerA polystyrene cupA stirring rodSamples of Iron, Magnesium and Zinc powderDilute hydrochloric acidA measuring cylinderA balanceYou should list 6 stages.
Question
When metals react with acids, it causes a temperature change. Plan an investigation to find which metal causes the greatest temperature change, using the following equipment:A thermometerA polystyrene cupA stirring rodSamples of Iron, Magnesium and Zinc powderDilute hydrochloric acidA measuring cylinderA balanceYou should list 6 stages.
Solution
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Set up your equipment: Place the polystyrene cup on a stable surface, and put the thermometer in the cup. Make sure the thermometer is not touching the sides or bottom of the cup.
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Measure out a set amount of dilute hydrochloric acid using the measuring cylinder (for example, 50ml), and pour it into the polystyrene cup. Record the initial temperature.
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Weigh out a set amount of the first metal sample (for example, 5g of Iron) using the balance.
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Add the metal sample to the acid in the cup, and stir the mixture with the stirring rod.
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Record the highest temperature reached. This is the temperature change caused by the reaction of the metal with the acid.
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Repeat steps 2-5 for the other two metal samples (Magnesium and Zinc). Compare the temperature changes to determine which metal causes the greatest temperature change when reacting with acid.
Remember to clean your equipment between each test to avoid contamination, and always handle acids with care.
Similar Questions
A student investigated how temperature affects the rate of reaction between magnesium carbonate and dilute hydrochloric acid. This is the method used.Heat hydrochloric acid to 30 oC in a conical flask.Add magnesium carbonate powder to the conical flask.Measure the loss in mass of the flask and contents every 20 seconds for 140 seconds.Repeat steps 1-3 with hydrochloric acid heated to 50 oCExplain why the contents of the conical flask lose mass.
Use Kinetic Molecular Theory to explain how temperature affects the rates of chemical reactions. Be detailed in your explanation.
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