Acid and bases

• What pH do acids have?


  less than 7
• What pH do alkaline have?


  more than 7
• What is neutral solutions pH?


  7
• What makes a solution acidic? 


  A higher concentration of H+ ions
• What makes a solution more alkaline? 


  A higher concentration of OH- ions
• What does a metal oxide + water form?

  metal hydroxide
• What does metal + acid form?

  salt + hydrogen
• What does metal carbonate + acid form?

  salt + carbon dioxide + water
• What does metal oxide + acid form?

  salt + water
• What does metal hydroxide + acid form?

  salt + water
• If water is formed during a reaction, what kind of reaction has taken place?

  neutralisation
• What type of salt would hydrochloric acid make?

  metal chloride
• What type of salt would sulphuric acid make?

  metal sulphate
• What type of salt would nitric acid make?

  metal nitrate
• How do you prepare an insoluble salt?

  • prepared in precipitation
  • mix K(Y) and (X)NO3 to get an insoluble salt
• How do you do precipitation?

  • mix solutions containing the ions in the insoluble salt
  • filter the mix
  • wash the precipitate
  • leave salt to dry