| Reaction | Balanced Chemical Reaction | Sign of Chemical Reaction | Type of Chemical Reaction |
| KI(aq) + Ag(aq) → KNO3(aq) + AgI(s) | KI(aq) + Ag(aq) → KNO3(aq) + AgI(s) | Change in colour: into an opaque yellow
Liquid form Solid cannot be seen |
Double Displacement |
| CoCl2(aq) + Na2SO4(aq) → CoSO4(aq) + NaCl (aq) | CoCl2(aq) + Na2SO4(aq) → CoSO4(aq) + 2NaCl (aq) | No Reaction
both aq |
No Reaction |
| NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l) | NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l) | A slight colour change: into a slight yellow
Heat present Clear liquid |
Double Displacement
– Neutralization |
| CuSO4(aq) + MgCl2(aq) → CuSO4(aq) + MgCl2(aq) | CuSO4(aq) + MgCl2(aq) → CuSO4(aq) + MgCl2(aq) | No Reaction
Both aq |
No Reaction |
| Na2SO4(aq) + Na2CO3(aq) → Na2SO4(aq) + Na2CO3(aq) | Na2SO4(aq) + Na2CO3(aq) → Na2SO4(aq) + Na2CO3(aq) | No Reaction
Same ionic ion in both compounds |
No Reaction |
| NaOH(aq) + Fe(NO3)3 → NaOH (aq) + Fe(NO3)3(s) | NaOH(aq) + Fe(NO3)3 → NaOH (aq) + Fe(NO3)3(s) | No Reaction | No Reaction |
| CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s) | CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s) | Rusting
Liquid is a light yellow colour Solid is an orange colour The Solid looks as if it was dissolving or disintegrating Precipitate formed |
Single Displacement |
| AgNO3(aq) + Cu(s) → CuNO3(aq) + Ag(s) | AgNO3(aq) + Cu(s) → CuNO3(aq) + Ag(s) | Solid changed colours: from orange to gray
Little bubbles formed on the solid Liquid seemed the same |
Single Displacement |
| Fe(NO3)3(aq) + Cu(s) → Fe(NO3)3(aq) + Cu(s) | Fe(NO3)3(aq) + Cu(s) → Fe(NO3)3(aq) + Cu(s) | No Reaction | No Reaction |
| CoCl2*6H2O(s) → CoCl2(s) + H2O(g) | CoCl2*6H2O(s) → CoCl2(s) + H2O(g) | Changed colour: turned into a light blue/purple colour
Powder clumped together Precipitate formed |
Decomposition
– Hydrate |
| CuSO4*5H2O(s) → CuSO4(s) + H2O(g) | CuSO4*5H2O(s) → CuSO4(s) + H2O(g) | Beige coluor change
Precipitate formed Powder clumped together |
Decomposition
– Hydrate |
| CoCl2(s) + H2O(l) → CoCl2*6H2O(s) | CoCl2(s) + 6H2O(l) → CoCl2*6H2O(s) | Solid absorbed liquid
Colour change into a dark purple Like it was before heated |
Synthesis |
| CuSO4(s) + H2O(l) → CuSO4*5H2O(s) | CuSO4(s) + 5H2O(l) → CuSO4*5H2O(s) | Solid absorbed liquid
Colour change into turquoise Like it was before heated |
Synthesis |
| Ca(s) + S(s) → CaS(s) | Ca(s) + S(s) → CaS(s) | Yellow top/deep red bottom but after about 2 minutes all yellow test tube
Bright red flash Precipitate formed Odour created |
Synthesis |
| Mg(s) + O2(g) → MgO(s) | 2Mg(s) + O2(g) → 2MgO(s) | Extremely bright white flash
Product a brittle white chalky solid |
Synthesis |
