acids, bases & salts

• What pH do acids have and what colour do they go with universal indicator?


  Acids have a pH below 7 and turn red with universal indicator.
• What pH do alkalis have and what colour do they go with universal indicator?


  Alkalis have a pH greater than 7 and turn purple with universal indicator.
• What pH do neutral substances have and what colour do they go with universal indicator?


  pH 7 and turn green with universal indicator.
• What are the acronyms for the reactions to make salts?

  MASH, BASW, AASW, CASCW
• When a metal reacts with an acid, which gas is produced? How do you test for it?


  Hydrogen gas. Test with a lighted splint, which will produce a "squeaky pop" sound when the gas is present.
• When a carbonate reacts with an acid, which gas is produced? How do you test for it?


  Gas: Carbon dioxide Test: Bubble the gas through limewater, which will turn cloudy if carbon dioxide is present.
• When hydrochloric acid reacts, which types of salts are formed (ending of the name)?

  Chloride salts.
• When sulphuric acid reacts, which types of salts are formed (ending of name)?


  Sulphates
• When nitric acid reacts, which types of salts are formed (ending of the name)?

  Nitrate salts.
• What do you call a substance which is one colour in acids and another colour in alkalis?

  Indicator
• Which method is used to react acids with alkalis?

  Neutralization/Titration
• What is the long thin piece of equipment called in titration?

  Burette
• When making copper sulphate, why do you add the copper oxide in excess?


  To ensure all the acid is reacted.
• When making copper sulphate, why do you have to filter it?


  Get rid of excess copper sulphate.
• When making copper sulphate, why do you leave it on the windowsill?

  Evaporation
• What is a base? When does it become an alkali?


  Base. Alkali: When dissolved in water.
• Which ions do solutions of acids contain?


  Hydrogen ions
• What is produced when acids react with metals?


  Hydrogen gas
• What is the ionic equation for neutralisation?

  H+ (aq) + OH- (aq) = H2O (l)
• Which indicator is used during titration? 


  Phenolphthalein
• What is Hydrochloric Acid in symbols?

  Hcl
• What is Sulfuric Acid in symbols?

  H2SO4
• What is Nitric Acid in symbols?


  HNO3
• Which indicator turns red in acids, green in neutral, and purple in alkalis?

  Universal Indicator
• What does MASH stand for?

  Metal+Acid -> Salt+Hydrogen
• What does BASW stand for?

  Base+Acid -> Salt+Water
• What does AASW stand for?

  Alkali+Acid -> Salt+Water
• What does CASCW stand for?

  Carbonate+Acid -> Salt+Carbon Dioxide+Water