SC8

• what is a precipitation reaction?

  A reaction in which a solid forms from the mixing of two aqueous solutions
• what does a metal carbonate + acid reaction produce?


  metal carbonate + acid --> salt + water + carbon dioxide
• what does a metal + acid reaction produce?


  metal + acid --> salt + hydrogen
• what is a soluble base called?


  an alkali
• what is a base?


  any substance that reacts with an acid to form a salt and water only. many are insoluble
• what is the equation for neutralisation with a base?


  metal oxide + acid --> salt + water
• what salts are formed by 1-hydrochloric acid 2- sulfuric acid 3-nitric acid ?

  1. chloride
  2. sulfate
  3. nitrate
• what are weak acids?


  Weak acids are acids that only partially dissociate in water, resulting in a low concentration of hydrogen ions
• what are strong acids?

  Acids that completely dissociate in water to produce a high concentration of hydrogen ions
• what is an equation for concentration?

  concentration = amount dissolved/ volume of solution
• what is the formula for calcium hydroxide?


  Ca(OH)2
• what is the formula for sulfuric acid?


  H2SO4
• what colours does phenolphthalein go in acids and alkaline?


  Colorless in acids, pink in alkaline
• what colours does menthyl orange go in acids and alkaline?


  Red in acids, yellow in alkaline
• what colour does litmus go in acids and alkaline?


  Red in acids, blue in alkaline