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發問:
For each of the following experiments, state all observable change(s) and write chemicalequation(s) involved. Give also the states of substances in the equations.(a) A piece of zinc is heated with steam.(b) A piece of lead is added to dilute hydrochloric acid.(c) A piece of magnesium is added to dilute... 顯示更多 For each of the following experiments, state all observable change(s) and write chemical equation(s) involved. Give also the states of substances in the equations. (a) A piece of zinc is heated with steam. (b) A piece of lead is added to dilute hydrochloric acid. (c) A piece of magnesium is added to dilute copper(II) sulphate solution.
最佳解答:
(a) zinc(s) + steam(g) → zinc oxide(s) + hydrogen(g) -- ZnO During the piece of zinc is heated with steam, its colour changes from silvery to white. (b) lead(s) + dilute hydrochloric acid(aq) → lead chloride(s) + hydrogen(g) During the piece of lead is added to dilute hydrochloric acid, it gives out gas bubbles. (c) magnesium(s) + dilute copper(II) sulphate solution (aq) → dilute magnesium(II) sulphate solution + copper(s) During the piece of magnesium is added to dilute copper(II) sulphate solution, it gives out gas bubbles
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救我!!!F.4 Chem...Reactivity of metals***plz~發問:
For each of the following experiments, state all observable change(s) and write chemicalequation(s) involved. Give also the states of substances in the equations.(a) A piece of zinc is heated with steam.(b) A piece of lead is added to dilute hydrochloric acid.(c) A piece of magnesium is added to dilute... 顯示更多 For each of the following experiments, state all observable change(s) and write chemical equation(s) involved. Give also the states of substances in the equations. (a) A piece of zinc is heated with steam. (b) A piece of lead is added to dilute hydrochloric acid. (c) A piece of magnesium is added to dilute copper(II) sulphate solution.
最佳解答:
(a) zinc(s) + steam(g) → zinc oxide(s) + hydrogen(g) -- ZnO During the piece of zinc is heated with steam, its colour changes from silvery to white. (b) lead(s) + dilute hydrochloric acid(aq) → lead chloride(s) + hydrogen(g) During the piece of lead is added to dilute hydrochloric acid, it gives out gas bubbles. (c) magnesium(s) + dilute copper(II) sulphate solution (aq) → dilute magnesium(II) sulphate solution + copper(s) During the piece of magnesium is added to dilute copper(II) sulphate solution, it gives out gas bubbles
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