What equation is formed when HCl is titrated against Na2CO3 using methyl orange as indicator

Na2CO3 + 2HCl ==> 2NaCl + H2O + CO2

Going to the methyl orange end point titrates ALL of the Na2CO3. Titrating to the phenolphthalein end point titrates just 1/2 of it; i.e., to NaHCO3.

When HCl (hydrochloric acid) is titrated against Na2CO3 (sodium carbonate) using methyl orange as an indicator, the reaction proceeds as follows:

HCl + Na2CO3 -> NaHCO3 + NaCl

In this reaction, hydrochloric acid reacts with sodium carbonate to form sodium bicarbonate (NaHCO3) and sodium chloride (NaCl). This is a neutralization reaction where the acid reacts with the base to form a salt.

To determine the equation for this reaction, we need to balance the chemical equation. The balanced equation is:

2HCl + Na2CO3 -> NaHCO3 + 2NaCl

In this equation, two moles of hydrochloric acid react with one mole of sodium carbonate to yield one mole of sodium bicarbonate and two moles of sodium chloride.

The indicator methyl orange is typically used in acid-base titrations to indicate the endpoint of the titration. Methyl orange changes its color from reddish-orange to yellow as the solution goes from acidic to slightly basic pH. This color change occurs when the acid has reacted completely with the base, indicating the end of the titration.

So the equation formed when HCl is titrated against Na2CO3 using methyl orange as an indicator is 2HCl + Na2CO3 -> NaHCO3 + 2NaCl.