How many " mL of " 0.1 M HCl is required to react completely using phenolphthalein with 2.0 g mixture of `Na_2CO_3` and `NaHCO_(3)` containing equimolar amounts of two?

Explanation

To solve the problem of how many mL of 0.1 M HCl is required to react completely with a 2.0 g mixture of Na₂CO₃ and NaHCO₃ containing equimolar amounts of both, we can follow these steps:

### Step-by-Step Solution:

1. **Define Variables:**
Let the mass of sodium carbonate (Na₂CO₃) be \( X \) grams. Then, the mass of sodium bicarbonate (NaHCO₃) will be \( 2 - X \) grams, since the total mass of the mixture is 2 grams.

2. **Calculate Molar Masses:**
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