Which of the following is evidence for a chemical reaction

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Reference no: EM13586205

1) Which of the following is evidence for a chemical reaction?

(a) Heating purple iodine crystals produces a purple gas.

(b) Dropping sodium metal into water produces fizzing.

(d) Mixing two colorless solutions gives a yellow solution.

2) Predict which of the following compounds are soluble in water:

(a) cobalt (II) hydroxide, Co(OH)2 ______________

(b) iron (II) sulfate, FeSO4 ____________________

(d) lead (II) acetate, Pb(C2H3O2)2 _____________

Reference no: EM13586205

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