509 SECTION 2Chemistry 34. Express the following statement as chemical equations

Question

509 SECTION 2Chemistry 34. Express the following statement as chemical equations and then balance them. Hydrogen burns in air to give water and suifur dioxide. sulfide gas 35. Express the folowing statement into chemical equation and then balance it. Potassium metal reacts with water to give potassium hydroxide and hydrogen gas 36. Express the following statement as chemical equation and then balance it. Barium chloride reacts with aluminum sulfate to give aluminum chloride and a precipitate of barium sulfate. 37. What is a chemical reaction? 38. Complete and balance the following equations: Ca(OH), + H.PO,- FeC, + NH.OH ? 39. Balance the following equations: 40. Complete and balance the following chemical equations

Explanation / Answer

34.

2H2S +3 O2 ----------------2 H2O + 2 SO2

35.

2 K +2 H2O ------------- 2KOH + H2

36.

3 BaCl2(aq) + Al2(SO4)3(aq) ------------- 3BaSO4(s) +2 AlCl3(aq)

38.

3 Ca(OH)2 + 2 H3PO4 ---------------- Ca3(PO4)2 + 6H2O

FeCl3 + 3 NH4OH ---------------- Fe(OH)3 +3 NH4Cl

39.

C6H12 +9 O2 ---------------- 6 CO2 + 6H2O

Zn + 2 HCl ---------------- ZnCl2 + H2

40.

C2H6 + O2 -------------- CO2 + H2O

2 C2H6 + 7 O2 ----------------- 4 CO2 + 6 H2O

Al2(CO3)3 +2 H3PO4 ---------------- 2 AlPO4 +3 CO2 +3 H2O

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