Ca + H2SO4

 The chemical formula (symbol) for calcium sulfate is:

CaSO₄

• Ca²⁺ = calcium ion

• SO₄²⁻ = sulfate ion

They combine in a 1:1 ratio to form CaSO₄,

 which is commonly found in gypsum and plaster of Paris.

Question: 28 of 47

INCORRECT

The chemical symbol (or formula) for calcium sulfide is:

CaS

• Ca = Calcium

• S = Sulfur

Together, they form CaS, which is an ionic compound where calcium (Ca²⁺) combines with sulfur (S²⁻) in a 1:1 ratio.

• Time Remaining: 06:59:03

Ca + H2SO4

Which of the following statements correctly describes the product of the reaction above?

Calcium sulfate

Calcium and sulfuric acid react to produce calcium sulfate and hydrogen gas.

Hydrogen sulfide

Hydrogen sulfide is not produced by this reaction. Hydrogen sulfide is produced by iron sulfide reacting with hydrochloric acid.

Calcium sulfide

MY ANSWER

Calcium sulfide is not produced by this reaction. Calcium sulfate can be reduced to calcium sulfide using carbon.

Hydrogen sulfate

Hydrogen sulfate is not produced by this reaction. Hydrogen sulfate (bisulfate ion) is the conjugate base of sulfuric acid.