Chemlab QUIZ Answer KEY PDF

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CHEM12.1 QUIZ ANSWER KEY

1. What are the coefficients to balance this equation? __ Al + __ O2 → __ Al2O3 Answer: 4,3,2 2. What is the name of this compound: P2O5? Answer: Diphosphorus pentoxide 3. What is the chemical formula of Hydrofluoric acid? Answer: HF 4. Complete the table by writing the formula of compounds which are composed of indicated positive and negative ions. Ions Magnesium Ferric Ammonium

Bromide a. f. k.

Cyanide b. g. l.

Sulfide c. h. m.

Answers: a. MgBr2 b. Mg(CN)2 c. MgS d. Mg(ClO3)2 e. Mg3(PO3)2 f. FeBr3 g. Fe(CN)3 h. Fe2S3 i. Fe(ClO3)3 j. FePO3 k. NH4Br l. NH4CN or CH4N2 (not sure) m. (NH4)2S n. NH4ClO3 o. (NH4)3PO3 5. What are the coefficients to balance this equation? __ C4H10O + __ O2 → __ CO2 + H2O Answer: 1,6,4,5 6. Write the chemical formula of Phosphorus trichloride? Answer: PCl3

Chlorate d i. n.

Phosphite e. j. o.

7. What is the chemical formula of Calcium nitride? Answer: Ca3N2 8. What is the chemical formula of Pentasulfur hexanitride? Answer: S5N6 9. What is the chemical formula of Mercuric hydroxide? Answer: Hg(OH)2 10. What is the name of this compound: Ca(HCO)2? Answer: Calcium bicarbonate 11. What is the name of this compound: HIO? Answer: Hypoiodous acid 12. What is the name of this compound: HCN? Answer: Hydrogen cyanide 13. What are the coefficients to balance this equation? __ (NH4)3PO4 + __ Pb(NO3)4 → __Pb3(PO4)4 + __ NH4NO3 Answer: 4,3,1,12 14. What is the coefficients to balance this equation? __ C7H9 + __ HNO3 → __ C7H6(NO2)3 + H2O Answer: 1,3,1,3 15. What is the name of this compound: NaClO4? Answer: Sodium Perchlorate...