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[匿名]

2009-09-17 4:19 pm

Complete the following word equation and write a balanced equation for each of the following:

1.Dinitrogen pentoxide gas in the presence of a platinum catalyst and high enough temperature decomposes to form.....

2.Sulfur solid reacts with iron solid to form.....

3.Magnesium metal reacts with hydrochloric acid (HCl) to form...

4.Magnesium sulfide solid and hydrochloric acid react to form....

5.Oxygen gas reacts with solid copper metal to form....

6.Voltage is applied to two electrodes in a solution of iron(111) chloride and a yellow-green gas bubbles form on one electrode and metallic deposits form on the other electrode.

7.Oxygen gas reacts with hydrogen gas to form....

8.Hydrogen sulfide gas is bubbled through a sodium hydroxide solution to produce....

9.Solid aluminum is reacted with hydrochloric acid (HCI) to form....

10. When strongly heated, magnesium sulfide formed a yellow crystalline deposit on the walls of a sealed reaction vessel. Metallic deposits were found on the bottom of the container.

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回答 (1)

nick

2009-09-18 3:29 am

✔ 最佳答案

1. 呢個example不太常見,我都要查下先知道
Dinitrogen Pentoxide --> Nitrogen Dioxide + Oxygen
2N2O5 --> 4NO2 + O2

下面個d係要背的!
2. Sulphur + Iron --> Iron(II) Sulphide
S + Fe --> FeS
(no need balance)

3. Magnesium + Hydrochloric Acid --> Magnesium Chloride + Hydrogen
Mg + 2HCl --> MgCl2 + H2

4. Mangesium Sulphide + Hydrochloric Acid --> Mangesium Chloride + Hydrogen Sulphide
MgS + 2HCl --> MgCl2 + H2S

5. Copper + Oxygen --> Copper(II) oxide
2Cu + O2 --> 2CuO

6. Iron(III) Chloride --> Iron + Chlorine
2FeCl3 --> 2Fe + 3Cl2

7. Oxygen + Hydrogen --> Water
O2 + 2H2 --> 2H2O

8. Hydrogen Sulphide + Sodium Hydroxide --> Sodium Sulphide + Water
H2S + 2 NaOH = Na2S + 2 H2O

9. Aluminium + Hydrochloric Acid --> Aluminium Chloride + Hydrogen
2Al + 6HCl --> 2AlCl3 + 3H2

10. Magnesium Sulphide --> Magnesium + Sulphur
MgS --> Mg + S

其實d equation就一定係靠背,至於balance人地係好難教你的,一定要做多d o~

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