Hydrobromic acid, HBr(aq)\text{HBr(aq)}HBr(aq), is a strong acid, whereas methanoic acid, HCOOH(aq)\text{HCOOH(aq)}HCOOH(aq), is a weak acid.
Explain the difference between a strong acid and a weak acid in terms of ionisation.
Acidic solutions contain hydrogen ions, H+\text{H}^+H+. Alkaline solutions contain hydroxide ions, OH−\text{OH}^-OH−. Write the balanced ionic equation for neutralisation.
A student investigates the neutralisation of potassium hydroxide, KOH\text{KOH}KOH, with hydrochloric acid, HCl\text{HCl}HCl.
Write a balanced symbol equation for this reaction.
Describe how a dry, pure sample of potassium chloride crystals can be obtained from the neutralised solution.
Hydrochloric acid is a strong acid.
A student has a solution of hydrochloric acid with a pH of 1.0. They add water to dilute the solution until the concentration of hydrogen ions decreases by a factor of 1000. Calculate the new pH of the solution.