acids + bases

• T or F

  the lower the pH the more alkali it is

  F - the more acidic it is
• what happens when water is added to acids?

  they form hydrogen ions H+
• what happens when bases are dissolved in water?

  they form hydrogen ions OH-
• what is litmus colour in acid + the colour in alkali?

  • red: acid
  • blue: alkali
• what is the phenolphtalein colour in acid + in alkali?

  • colourless: acid
  • pink: alkali
• what is the colour of methyl orange in acid + in alkali?

  • red: acid
  • yellow: alkali
• what do indicators contain?

  organic compounds that appear different colours in acids + alkalis e.g. litmus