Problem: Which pair of substance can be dissolved together (in the right ratio) to prepare a buffer solution?i, C2H3O2Hii. NaC2H3O2iii. NaOHiv. HClv. NaClA. i and iiB. i and iiiC. ii and iiiD. i and ii, ii and iv, i and iiiE. iv and v; i and iii

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Which pair of substance can be dissolved together (in the right ratio) to prepare a buffer solution?

i, C2H3O2H
ii. NaC2H3O2
iii. NaOH
iv. HCl
v. NaCl

A. i and ii

B. i and iii

C. ii and iii

D. i and ii, ii and iv, i and iii

E. iv and v; i and iii

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