Distinguishing hydrates from non-hydrates: (fill in chart below) Solid/Compound
ID: 887242 • Letter: D
Question
Distinguishing hydrates from non-hydrates: (fill in chart below)
Solid/Compound
Original
Color
Water
Appears
Color of residue after heating
1 drop H2O
Color change
3 mL H2O
Water solution
Sodium chloride
White
Nickel(II)sulfate
Blue
Cobalt(II)chloride
Red
Copper(II)chloride
Green
Aluminum sulfate
White
sugar
White
Potassium dichromate
orange
Solid/Compound
Original
Color
Water
Appears
Color of residue after heating
1 drop H2O
Color change
3 mL H2O
Water solution
Sodium chloride
White
Nickel(II)sulfate
Blue
Cobalt(II)chloride
Red
Copper(II)chloride
Green
Aluminum sulfate
White
sugar
White
Potassium dichromate
orange
Explanation / Answer
NaCl - White , Colorless , No residue , No change , No change
NiSO4 - Blue , Blue , Black , Blue , Blue
CoCl2 - Red , Pink , Blue , Pink , Pink
CuCl2 - Green , Blue-Green , Brown , Green , Green
Al2(SO4)3 - White , Colorless , Colorless , White , White
Sugar - White , Colorless , No residue , Colorless , Colorless
K2Cr2O7 - Orange , Orange , yellow , Orange , orange