what happens in the following cases? Also, write their balanced chemical equations. Gure of sulphur and iron is heated. Magnesium ribbon burns in air. A Potassium comes in contact with water. Sidium comes in contact with water. Sodium chloride solution is mixed with silver nitrate solution. & Pottasium iodide solution is mixed with lead nitrate solution. Carbon dioxide and water react in the presence of sunlight and chlorophyll. i Sodium bicarbonate is heated. ! Hydrogen reacts with oxygen gas. Carbon burns in the presence of oxygen.
Answers
(a) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)
2KBr(aq)+BaI2(aq)→2KI(aq)+BaBr2(s)
In this reaction, both the reactants exchanges ions to for two new products, hence, it is a double displacement reaction
(b) zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)
ZnCO3(s)→ZnO(s)+CO2(g)
In this reaction, a single substance yields two different product. hence, it is a decomposition reaction
(c) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)
H2(g)+Cl2(g)→2HCl(g)
In this reaction, two different reactants react with each other to form a single product. Hence, it is called a combination reaction
(d) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)
Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)
In this reaction, more reactive Mg is replacing less reactive H. Hence, it is displacement reaction