Each of the following pairs of chemicals are dissolved in aqueous [AK-wee-uhs] solution at concentrations of 1 molar. Which pair would form a buffer solution?

W) Sodium formate and formic acid

X) Sodium nitrate and ammonia

Y) Sodium hydroxide and nitric acid

Z) Sodium chloride and hydrochloric acid
W) SODIUM FORMATE AND FORMIC ACID