Questions:
1.State how we make use of the characteristic flame colours of the salts of the s-Block elements.

2.On testing the thermal stability of the carbonates , state what will happen if the delivery tube is not removed from the lime water after heating is stopped.Explain briefly.

3. Write all chemical equations for the reactions occurred on heating the carbonates of GroupⅡ elements.

4.Arrange the thermal stability of the carbonates of GroupⅡ elements in descending order.

5.Write all chemical equations for the reactions occurred on mixing nitrate solutions of GroupⅡ elements and sodium hydroxide solution.

6.Arrange the solubility of the hydroxides of GroupⅡ elements in descending order.

7.Write all chemical equations for the reactions occurred in mixing nitrate solutions of GroupⅡ elements and sodium sulphates solution.

8.Arrange the solubility of the sulphates of GroupⅡ elements in descending order.

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[ 本帖最後由 蟬之武者 於 2008-1-9 05:33 PM 編輯 ]

1.  to find out the energy level of electrons excited to.

2. the lime water will be sucked back to the hot boiling tube through the delivery tube so that the boiling tube will be broken by steam.

3. MCO3 -> MO+ CO2

4.Ba2+>Sr2+>...

5.M(NO3)2 +OH- ->M(OH)2 + NO3-

6.Ba2+>Sr2+>...

7.M(NO3)2 +SO42- ->MSO4 + NO3-

8.Be2+>Mg2+>...

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真係好懶呀..........
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