EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记:2.4.6 Practical: Investigate Metals Reacting with Acids

EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记:2.4.6 Practical: Investigate Metals Reacting with Acids

Practical: Investigate Metals Reacting with Acids

Aim:

To investigate the reactions between dilute hydrochloric and sulfuric acids with the metals magnesium, iron and zinc

Diagram:

 

 

Investigating the reactions of dilute acids with metals

 

 

Method:

  • Wear some safety glasses before handling acids
  • Using a small measuring cylinder, add 5 cmof dilute hydrochloric acid to each of three test tubes
  • Add about 1 cm length of magnesium ribbon to the first tube, observe and note down what you see
  • Use a lighted splint to test for any gases given off
  • To the second test tube add a few pieces of iron filings and to the third some zinc turnings
  • Observe what happens, test for any gases and note down your observations
  • Repeat the experiment with dilute sulfuric acid

 

 

Results:

 

Metals with Acids Observations Table

 

 

Equations for the Reactions

Conclusions:

  • The metals can be ranked in reactivity order Mg > Zn > Fe
  • The three metals react in the same with both acids
  • Hydrogen and a metal salt solution is produced

转载自savemyexams

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