Question

2(i) As water is heated, its pH decreases. This means that a. the water is no...

2(i) As water is heated, its pH decreases. This means that

a. the water is no longer neutral

b.the Kw value is decreasing

c. the water has a lower [OH-] than cooler water

d. the dissociation of water is an endorthermic process

e. none of these

Brief explanation.

2(ii) These ion H2PO4^- has both a conjugate acid and a conjugate base. These are respectively

a. H3PO4 and PO4^3-

b. H3PO4 and HPO4^2-

c. H2PO4^- and HPO4^2-

d. HPO4^2- and PO4^3-

e. HPO4^2- and H3PO4

Brief explanation.

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