chem formula好急

1. Nickel(II)nitrite NiNO2 ; colour: green
2. sodium hydrogencarbonate NaHCO3 ; colour: colourless
3. iron(III)sulphate Fe2(SO4)3 ; colour: yellow or brown
4. ammonium carbonate (NH4)2CO3 ; colour: colourless
5. aluminium sulphide (NH4)2S ; colour: colourless
6. potassium permanganate KMnO4 ; colour: purple
7. Iron(II) nitrate Fe(NO3)2 ; colour: green
8. copper(I) oxide Cu2O ; colour: brown
9. Magnesium sulphite MgSO3 ; colour: colourless
10. Lithium hydroxide LiOH ; colour: colourless


2011-01-11 17:49:36 補充：
Sorry the formula for Nickel(II) nitrite is Ni(NO2)2
And the aluminium sulphide is Al2S3
The others are correct.

2011-01-11 20:44:55 補充：
In Cu2O, it consists of Cu+ and O^2-, thus 2 mole of Cu+ chemically combines with 1 mole of O^2- to form 1 mole Cu2O

Lithium hydroxide solid is white
But when dissolving in water, it is soluble, and gives a colourless solution.

1. Nickel(II)nitrite Ni(NO2)2

2.sodium hydrogencarbonate NaHCO3

3.iron(III)sulphate Fe2(SO4)3

4.ammonium carbonate (NH3)2CO3

5.aluminium sulphide Al2S3
6. Potassium permanganate KMnO4

7. Iron(II)nitrate Fe(NO3)2

8. Copper(II) oxide Cu2O

9. Magnesium sulphite MgSO3

10. Lithium hydroxide LiOH



2011-01-11 17:51:08 補充：
1) colour: green from Ni2+
2) colour: colourless
3) colour: yellow from Fe3+
4) colour: colourless
5) colour: colourless
6) colour: purple from MnO4-
7) colour: green from Fe2+
8) Copper (I) oxide is Cu2O colour: red from Cu+
9) colour: colourless
10) colour : white