Preperation Of Salts

Question 1

What do acids react with to form soluble salts

Answer 1

• some metals
• insoluble bases: added to acid until no more will react, excess solid is filtered off
• alkalis: an indicator can be used to show when the acid and alkali have completely reacted produce a salt solution

Question 2

How are solid salts produced

Answer 2

Salt solutions can be crystallised

Question 3

How are insoluble salts made

Answer 3

• by mixing appropriate solutions of ions that a precipitate is formed
• precipitation can be used to remove unwanted ions like when treating water
  Example:
• Sodium iodide (NaI) and silver nitrate (AgNO3) are 2 soluble salts, so aqueous solution are formed
• add silver nitrate into sodium iodide and solid is formed
• this solid is a precipitate, an insoluble salt AgI (silver iodide)
• it is a displace reaction, the 2 products are NaNO3 and Agl
• the insoluble product is the precipitate