Question

What is the balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)? Calculate the number of moles of HCl if 25 ml of 0.1 M NaOH is used for the reaction, assuming the reaction goes to completion.

Answer 1

The balanced chemical equation for the reaction between hydrochloric acid  HCl  and sodium hydroxide  NaOH  is:HCl  aq  + NaOH  aq   NaCl  aq  + H2O  l This is an acid-base neutralization reaction, and the stoichiometry is 1:1 for HCl and NaOH.To calculate the number of moles of HCl needed for the reaction, we can use the given information about NaOH:Volume of NaOH = 25 mL = 0.025 L  converting mL to L Concentration of NaOH = 0.1 MNumber of moles of NaOH = Volume  ConcentrationNumber of moles of NaOH = 0.025 L  0.1 mol/L = 0.0025 molSince the stoichiometry is 1:1, the number of moles of HCl needed for the reaction is also 0.0025 mol.