chem test

• what is the general equation for the reaction between an acid and a metal ?

  acid + metal = salt + hydrogen (A)
• which gas is produced when an acid is neutralised by a metal carbonate ?

  carbon dioxide
• what type of substance is zinc chloride ?

  salt
• a student reacts an acid with copper oxide the reaction between the acid and the copper oxide is slow at room temp how could the student speed it up ?

  heat it up with a bunsen burner
• the student adds copper oxide to the acid until the copper oxide is

  in excess
• the student filters the unreacted copper oxide from the solution which apparatus does the student use ?

  filter funnel
• what process is used to produce crystals of a salt from a salt solution ?

  crystalization
• which ion is found in all acids ?

  H*
• Zinc nitrate can be produced by reacting an acid and a metal oxide name the acid and the metal oxide used to produce zinc nitrate ?

  acid = nitric acid

  metal oxide = zinc
• in an equation zinc nitrate is written as Zn(N03)2(aq) what does aq mean ?

  dissolved in water
• add all these missing state symbols to the equation = CaCo3 ( ) + 2hcl(aq) = CaCl2 () + H20 () + C02 ( )

  s , aq , l , g
• the calcium salt that is formed is absorbed during digestion what is the name of the calcium salt ?

  calcium chloride
• Describe one way in which this reaction can be made to go faster ?

  increase the temperature
• How does the ph solution change as the temp of the water increases ?

  ph of the solution increases
• carbon dioxide is soluble in water and forms an acidic solution which ion make the solution acidic ?

  h* ion
• how does the solubility of carbon dioxide change as the temp of the water increases ?

  the solubility increases