Acid and Alkali test

• Red Litmus paper was placed into a solution.

  The red litmus paper turned a blue colour.

  This means that the solution is...

  alkaline
• Describe an indicator

  Different indicators change colour at different pH levels.
• Magnesium Oxide + Hydrochloric acid =

  magnesium chloride + water
• Which equipment is used to accurately measure the mass of a solid?

  Balance
• A solution is stored in a bottle with a corrosive hazard symbol on it. This solution is...

  Strongly acid or strongly alkaline
• What technique is sued to separate water from copper sulfate solution?

  Evaporation
• Universal Indicator would be more appropriate to measure pH that litmus paper because....

  Universal Indicator tells you precisely which pH from 1 - 14 whereas litmus paper only tells you about how acidic or alkaline.
• Describe a salt

  When the hydrogen in an acid is replaced by a metal.
• What is the difference between pH 1 and pH 3?

  pH 1 is 100 times more acidic that pH 3
• State what the arrow in a word equation represents

  A chemical reaction taking place
• _____+ _________= calcium chloride + water + carbon dioxide

  carbonate + hydrochloric acid
• Write a word equation to show the neutralisation reaction between sodium hydroxide and nitric acid

  sodium hydroxide + nitric acid = sodium nitrate + water