Classify the following as acid-base reactions or oxidation-reduction reactions:
(a)na2s + hcl -> h2s + 2nacl
(b)2na + 2hcl -> h2 + 2nacl
(c)mg + cl2 = mgcl2
(d)mgo + 2hcl = h2o + mgcl2
(e)k3p+2o2 -> k3po4
(f)3koh +h3po4 -> k3po4 + 3h2o

Explanation:

(a)

This is acid base reaction because there is no change of oxidation state on either side of the reaction.

(b)

This is a oxidation reduction reaction because sodium in elemental state ( 0 oxidation state) oxidizes to Na⁺ in NaCl. Also H⁺ in HCl reduces to H° in H₂.

(c)

This is a oxidation reduction reaction because magnesium in elemental state ( 0 oxidation state) oxidizes to Mg²⁺ in MgCl₂. Also Cl° in Cl₂ reduces to Cl⁻ in  MgCl₂.

(d)

This is acid base reaction because there is no change of oxidation state on either side of the reaction.

(e)

This is a oxidation reduction reaction because phosphorous in P³⁻ in K₃P oxidizes to P⁵⁺ in K₃PO₄ and oxygen reduces.

(f)

This is acid base reaction because there is no change of oxidation state on either side of the reaction.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.