g of a mixture of and requires mL of for neutralization using phenolphthalein as indicator. The weig — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

In phenolphthalein titration, only $Na_2CO_3$ reacts to form $NaHCO_3$ ($n=1$). <br>Meq of $Na_2CO_3$ = Meq of $HCl$ <br>$(W / 106) \times 1 \times 1000 = 20 \times 0.1 \Rightarrow W/106 = 0.002 \Rightarrow W = 0.212$ g.