2NH3 + MgSO4 +2H2O —> Mg(OH)2 + (NH4)2SO4 Using the chemical equation above answer the following questions.

1) If I have 4.2 moles of MgSO4 and 5.4 moles of NH3 which one is the limiting reactant?

2) What is the greatest amount of Mg(OH)2 that can be made with 4.6 moles of MgSO4 and 5.4 moles of NH3?

3) How many moles of the excess reactant is left over after the reaction has been completed?

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

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What is the atomic number of an atom that has 6 protons