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Kyy010203 發問於 科學及數學化學 · 1 十年前

F.4 Chem

Explain (with equation)what you would observe for any reaction that occurs .

1) an iron nail is left in a beaker of magnesium sulphate solution for about 30 minutes.

2)a piece of strontium(Sr) is added to a beaker of cold water.( strontium is between calcium and barium in group ll of the periodic table)

3)a bent iron nail is left in a gel containing rust indicator for one week.

4)a piece of steel is wrapped with some copper wire and placed in a shallow dish with tap water for a day.

1 個解答

評分
  • Roy
    Lv 5
    1 十年前
    最愛解答

    Fe+MgSO4--->Fe+MgSO4 (NO REACTION since Fe is less reative than MG)

    Sr+H2O--->SrO+H2

    the two side of the iron nail will show pink colour and the other part will be blue since it rusts because it is bent which will increase the rate of rusting.

    Fe rusts faster since it is connected to Cu which is a less reactive metal than Fe. and there is water and air(Oxygen) for rusting to occur.

    hope that can help you

    資料來源: myself
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