Question

Which is a redox reaction?

a. 2H Br+ Ba (OH)2 --> 2H2 O+ BaBr2
b. 2AIPO4 + 3Mg --> 2Al + Mg3 (PO4)2
c. HNo3 + NaOH --> H2O + NaNO3
d. NaCl + H2So4 --> Na2 SO4 + 2HCl

Answer 1

i think it's D

Because O is added to Na

and

H is added to Cl

Answer 2

d. NaCl + H2So4 --> Na2 SO4 + 2HCl

Step-by-step explanation:

The reaction between sodium chloride (NaCl) and sulfuric acid (H2SO4) is a redox reaction.
In a redox reaction, one reactant loses electrons and is oxidized, while the other reactant gains electrons and is reduced. In this reaction, sodium chloride is oxidized and sulfuric acid is reduced.

Sodium chloride is oxidized because it loses an electron to sulfuric acid. The oxidation state of sodium in sodium chloride is +1, and the oxidation state of sodium in sodium sulfate is +2. This means that sodium has lost an electron.

Sulfuric acid is reduced because it gains an electron from sodium chloride. The oxidation state of sulfur in sulfuric acid is +6, and the oxidation state of sulfur in sodium sulfate is +4. This means that sulfur has gained an electron.

The overall reaction can be written as follows:

NaCl + H2SO4 → Na2SO4 + HCl

This reaction is a redox reaction because it involves the transfer of electrons between sodium chloride and sulfuric acid.