Make up the equations o f the reactionss

C + CaO =CaC₂ + H₂O =

Al₄C₃ + H₂O =

CO₂ + C =

CO + O₂ =

CO + Fe₂O₃ =

CO + Fe =

CO + NH₃ =

C + O₂ =

CaCO₃

CaCO₃ + HCl =

CO₂ + H₂O =

CO₂ + Ca(OH)₂ =

CaCO₃ + CO₂ + H₂O =

Na₂CO₃ + H₂O =

SiO₂ + Mg =

Si + Mg =

Mg₂Si + HCl =

SiH₄ + C =

Si + NaOH + H₂O =

Si + O₂ =

SiO₂ + HF =

SiO₂ + NaOH =

SiO₂ + Na₂CO₃ =

Na₂SiO₃ + CO₂ + H₂O =

Na₂CO₃ + CaCO₃ + SiO₂ =

Si + C =

SiO₂ + C _(excess) =

Experimental section

1. Materials and equipment: magnesium dust, crystalline silicon (IV) oxide, copper (ІІ) sulphate, nickel (ІІ) sulphate, cobalt (ІІ) sulphate, lime water, solutions of litmus, phenolphthalein, strontium chloride, barium chloride, aluminium sulphate, copper (ІІ) sulphate, chrome (ІІІ) nitrate, iron (ІІІ) chloride, sodium carbonate, potassium thiocyanate, sodium silicate, hydrochloric acid, sodium hydroxide, acetic acid, ammonia, concentrated hydrochloric acid, ceramic tile, 100 mls beakers, test tubes, glass rods,

2. Chemical properties of carbon

2.1. Fill a 50 mls beaker with carbon (IV) oxide from Kipp gas generator. Check up, does carbon (IV) oxide support burning of decaying splinter. Then burn magnesium strip and put it into the beaker with carbon (IV) oxide. Does carbon (IV) oxide support burning of magnesium? Why? In what role does carbon (IV) oxide act in this reaction?

2.2. Place distilled water in a test tube to half of its volume and add 2-3 drops of litmus neutral solution. Then pass carbon (IV) oxide from Kipp gas generator in this water. What can you observe? How and why does pH change? Write the equation of the reaction of carbon (IV) oxide dissolution in water.

2.3. Place lime water in conical test tube to half of its volume and pass carbon (IV) oxide from Kipp gas generator in it until precipitate forms. Continue passing the gas until precipitate dissolves completely. Then heat this test tube with the solution. What can you observe? Write down the equations of all reactions, which have taken place.

2.4. Place 4-6 drops of sodium carbonate solution into each of two test tubes and add 4-6 drops of solutions: of barium chloride into the first, of strontium chloride into the other. What is the colour of precipitates, which were formed?

Add some drops of 2 M solution of acetic acid to precipitates. What can you observe? Explain the observations and write down the equations of all reactions.

2.5. Place 4-6 drops of sodium carbonate solution into each of three test tubes and add 3-4 drops of 0,5N solution: of aluminium sulphate into the first, of copper (ІІ) sulphate into the second, of chrome (ІІІ) nitrate into the third. What can you observe? Give the equations of the relevant reactions.

2.6. Place 3-4 mls of very diluted ammonia solution into a test tube, add one drop of phenolphthalein and pass carbon (IV) oxide from Kipp gas generator until indicator changes colour. Explain the reason of solution discolouration. Give the equations of the relevant reactions.

2.7. Place 4-6 drops of potassium thiocyanate solution into two test tubes and add 2-3 drops of solutions: of iron (ІІІ) chloride into the first, of copper (ІІ) sulphate into the other. What can you observe? Give the equations of the relevant reactions.