1. Balance and classify each of the following reactions by its type. Classification H2S (g) + _O2 (g) SO2 (g) a. H20 (g) + b. KNO3 (aq) · KNO2 (aq) + O2 (g) Nal (aq) + Cl2 (g) -NaCI (aq) + 12 (aq) с.

Balance each chemical equation MgS(s) + HCl(aq) ----> MgCl2(aq) + H2S(g)

Balance the following reaction. If a reactant or product is not present, put a zero (0) in the blank. H+(aq) + H2O(l) + ClO-13(aq) + e-1 <--> Cl-1(g) + H+(aq) + H2O(l)

Gold(III)hydroxide is used for electroplating gold onto other metals. It can be made by the following reaction (note the equation is unbalanced) KAuCl4(aq) + NaɔCO3(aq) + 3H,O(1) - Au(OH);(aq) + NaCl(aq) + KCI(aq) + CO2(g) To prepare a fresh supply of Au(OH), a chemist at an electroplating plant has mixed 20.00g of KAUC1, with 25.00g of Na CO3 (both dissolved im excess water) a. How many grams of NaCO: will b'required to react with KAUCI4? (only 3 decimal places) g of NanCO b. what is the maximum number of grams of Au(OH); than can be formed? (only 2 decimal places) Activate Windows g of Au(OH); 11:04 Links 20°C 23-Nov- ch Ipcert | Delete

Which of the following reactions are redox reactions?    i)   2 C6H6 (l)   +   15 O2 (g)     ->     12 CO2 (g)   +    6 H2O (g)                                    ii)   Pb(NO3) 2 (aq)    +    2 KCl  (aq)    -->    PbCl2 (s)    +   2 KNO3(aq)                     iii)   3 Mg (s)    +   2 FeCl3 (aq)    -->    3 MgCl2 (aq)   +   2 Fe (s)

0.529 47.629 1. Initial mass of copper 2. Mass of copper and evaporating dish 3. Mass of evaporating dish 4. Mass of recovered copper 5. Percent yield (show cafcuntions) 6. Describe the reaction Cu(s)+HNO3(aq)→. 7. Describe the reaction Cu(NO3)2(aq)+NaOH(aq)→. 8. Describe the reaction Cu(OH)2(s)-A. 9. What are you removing by this washing? 10. What copper compound is present in the beaker? 11. Describe the reaction CuSO4(aq)+Zn(s) or CuSO4(aq)+ AI(s). 12. What is present in solution? 13. What is the gas? 14. How do you know? 15. What are you removing by washing? 16. What color is your copper sample? 17. Is it uniform in appearance? 18. Suggest possible sources of error in this experiment.

When a solution of magnesium nitrate is mixed with a solution of sodium phosphate, the solid that forms is magnesium phosphate. Select the equation that represents the complete ionic equation. 17. А. Mg(NO3)2(aq) + Na,PO,(aq) → MGPO4(s) + NaNO;(aq) В. Mg2"(aq) + PO,-(aq) > MGPO,(s) С. 3Mg(NO3)2(aq) + 2Na;PO4(aq) → Mg;(PO4)2(s) + 6NANO3(aq) 3MG2"(aq) + 2PO (aq) > Mg3(PO4)2(s) 3MG2"(aq)+6NO; (ag) + 6Na"(aq) + 2PO,*(aq) →Mg;(PO4)2(s)+6NO;(aq)+ 6Na*(aq) D. Е.

4. Calculate the calculate the mass of precipitate formed from 5.0 g of strontium chloride. Li3PO4(aq) → Sr3(PO4)2(S) + LiCl(aq) _SrCl₂(aq) + 5. What mass of aluminum hydroxide in needed to neutralize 5.00 g of hydrochloric acid? Al(OH)3(s) + _HCl(aq) → ___AlCl3(aq) + _H₂O(1) 195

Fe3+ + Cr2O72- → Fe2+ + Cr3+. Cr2O72- + ClO2- → Cr3+ + ClO2. Fe3+ + ClO2- → Fe2+ + ClO2. No reaction.

5. Identify each of the following reactions as either synthesis, decomposition, single displacement, double displacement, combustion, or neutralization 2Li(s) + H₂O(1)→ Li₂O(s) + H2(g) SO2(g) + H₂O → H₂SO3(aq) 02|| AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) + 2NaOH(aq) → Na₂CO3(aq) + H₂CO3(aq) 2H₂O C3H8(g) + 502(g) → 3CO2(g) + 4H₂O(1) Mg(OH)2(aq) → MgO(s) + H₂O(1)