Exam 4: Gas Evolution Reactions

Question 1

sulfides (S(2-))

Answer 1

react with acid to form H2S

Question 2

Carbonates (CO3(2-)) and Bicarbonates (HCO3(-))

Answer 2

react with acid to form
Intermediate product: H2CO3
Gas Evolved: CO2

Question 3

Sulfates (SO4(2-)) and Bisulfates (HSO4(-))

Answer 3

when heated/reduced
Intermediate product: H2SO3
gas evolved: SO2

Question 4

ammonium (NH4+)

Answer 4

when reacting with strong base
Intermediate Product: NH4OH
Gas Evolved: NH3