B. QUESTIONS AND PROBLEMS: List the reactions that were: 1. Endothermic 2. Exoth

Question

B. QUESTIONS AND PROBLEMS: List the reactions that were: 1. Endothermic 2. Exothermic I. ll. III. IV. List the reactions that formed a precipitate List the reactions that formed a gas: Name the following: 1. Naci 2. KOH 3. Cu(NOs)a 4. Ag:SO 5. NHSCN 6. Al2O 7. MgS 8. NaH PO 9. Fe(OH) 10. Pb(CHaCOO)2 V. Write the chemical formulas for: 1. Hydrochloric acid: 2. Copper (II) chloride: 3, Calcium phosphate: 4. Magnesium acetate_ 5. Silver carbonate: 7. Lead (IV) oxide: 8. Iron(III) sulfide: 9. Ammonium hydrogen sulfite: 6. Copper(II) phosphate_ 501Page

Explanation / Answer

Endothermic Reax.

sunlight + 6CO2(g) + H2O(l) -> C6H12O6(aq) + 6O2(g)

Exothermic Reax.

Na(s) + 0.5Cl2(s) -> NaCl(s)

II. Precipitation Reax.

2NaOH(aq.) + MgCl2(aq.) ->  2NaCl(aq) + Mg(OH)2(s)

III. CaCO3(s) -> CaO(s) + CO2(g)

IV. 1 Sodium Chloride

2 Potassium Hydroxide

3 Copper(II)Nitrate

4 Silver(I)Sulphate

5 Ammonium Thiocyanate

6 Aluminium Oxide

7 Magnesium Sulphide

8 Sodium Dihydrogen Phosphate

9 Iron(III) Hydroxide

10 Lead(II) acetate

V.

1 HCl

2 CuCl2

3 Ca3(PO4)2

4 Mg(CH3COO)2

5 Ag2CO3

6 Cu3(PO4)2

7 PbO2

8 Fe2S3

9 NH4HSO3

10 KMnO4

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