Daltons atomic theory

• Acids


  Have a pH less than 7
• Lower pH


  The more acidic the substance is
• Neutral solutions have pH 7
• Alkalis


  Have a pH more than 7
• Higher pH


  The more alkaline the substance is
• Neutralisation is a reaction between an acid and an alkali
• Neutralisation reaction


  Acid + alkali → salt + water
• Neutralisation reaction


  Acid + base → salt + water
• Word equations summarise a reaction by writing the names of the substances you start with and the names of the new substances that are made
• Reactants are the substances you start with and are written on the left side of the word equation
• Products are the new substances that are made and are written on the right side of the word equation
• There is an arrow between the reactants and products
• The arrow means 'react to form'
• Do not write an equals sign, =
• Hydrochloric acid and sodium hydroxide are the reactants
• Sodium chloride and water are the products