Entry Task- March 1 st Friday Entry Task Question: Write it down 2H 2 + O 2  2 H 2 O If there are 4.5 moles of Hydrogen gas, how many grams of water.

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Entry Task- March 1 st Friday Entry Task Question: Write it down 2H 2 + O 2  2 H 2 O If there are 4.5 moles of Hydrogen gas, how many grams of water will it create?

Agenda: Discuss Stoichiometry ws #1 MORE MORE Practice with stoich. HW: Stoichiometry ws 2

1. Balance the Rxn: Potassium bromide reacts with magnesium metal creates potassium metal magnesium bromide _____KBr + _____Mg  _____MgBr 2 + _____ K 2 2 a. How many moles of magnesium were used to create 8.23 moles of magnesium bromide? = moles Mg 8.23 moles of MgBr 2 8.23 Units match 1 mol MgBr 2 1 mol Mg

b. How many moles of potassium bromide are needed to react with 0.255 moles of magnesium? = moles KBr 0.255 moles of Mg 0.510 Units match 1 mol Mg 2 mol KBr _____KBr + _____Mg  _____MgBr 2 + _____ K 2 2

c. How many moles of magnesium bromide were produced if 65.5g of magnesium were used? = moles MgBr 2 65.5 g Mg 2.69 Units match 1 mol Mg 24.305 g Mg1 mol Mg 1 mol MgBr 2 65.5 X 1 = 65.5 24.305 X 1 = 24.305 _____KBr + _____Mg  _____MgBr 2 + _____ K 2 2

d. How many moles of potassium bromide were used if 125g of magnesium bromide were produced? = moles KBr 125 g MgBr 2 1.36 Units match 1 mol MgBr 2 184.10 g MgBr 2 1 mol MgBr 2 2 mol KBr 125 X 2 = 250 184.10 X 1 = 184.10 _____KBr + _____Mg  _____MgBr 2 + _____ K 2 2

2. Tin IV oxide reacts with hydrogen monofluoride to create Tin IV fluoride and water a. How many moles of Tin IV oxide were used to create 0.643 moles of water? = moles SnO 2 0.643 moles of H 2 O 0.322 Units match 2 mol H 2 O 1 mol SnO 2 _____SnO 2 + _____HF  _____SnF 4 + _____H 2 O 42

b. How many moles of hydrogen monofluoride were used to create 8.55 moles of Tin IV fluoride? = moles HF 8.55 moles of SnF 4 34.2 Units match 1 mol SnF 4 4 mol HF _____SnO 2 + _____HF  _____SnF 4 + _____H 2 O 42

c. How many moles of Tin IV fluoride were produced if 15.0 g of hydrogen monofluoride were used? _____SnO 2 + _____HF  _____SnF 4 + _____H 2 O 42 = moles SnF 4 15.0 g HF 0.187 Units match 1 mol HF 20.00 g HF4 mol HF 1 mol SnF 4 15.0 X 1 = 15.0 20.00 X 4 = 80

d. How many moles of Tin IV oxide were used if 50.0 g of Tin IV fluoride were produced? _____SnO 2 + _____HF  _____SnF 4 + _____H 2 O 42 = moles SnO 2 50.0g SnF 4 0.257 Units match 1 mol SnF 4 194.7 g SnF 4 1 mol SnF 4 1 mol SnO 2 50.0 X 1 = 50.0 194.7 X 1 = 194.7

Cobalt metal reacts with lead II phosphate to create lead metal to cobalt II phosphate a. How many moles of Lead II phosphate were used to create 7.50 moles of lead metal? = moles Pb 3 (PO 4 ) 2 7.50moles of Pb 2.5 Units match 3 mol Pb 1 mol Pb 3 (PO 4 ) 2 _____Co + _____Pb 3 (PO 4 ) 2  _____Pb+ _____Co 3 (PO 4 ) 2 33

Cobalt metal reacts with lead II phosphate to create lead metal to cobalt II phosphate b. How many moles of Cobalt metal were used to create 0.67 moles of Cobalt II phosphate? = moles Co 0.67moles of Co 3 (PO 4 ) 2 2.01 Units match 1 mol Co 3 (PO 4 ) 2 3 mol Co _____Co + _____Pb 3 (PO 4 ) 2  _____Pb+ _____Co 3 (PO 4 ) 2 33

Cobalt metal reacts with lead II phosphate to create lead metal to cobalt II phosphate c. How many moles of Lead were produced if 45.8g of Cobalt were used? = moles Pb 45.8 g Co 0.777 Units match 1 mol Co 58.933 g Co3 mol Co 3 mol Pb 45.8 X 3 = 137.4 58.933 X 3 = 176.799 _____Co + _____Pb 3 (PO 4 ) 2  _____Pb+ _____Co 3 (PO 4 ) 2 33

Cobalt metal reacts with lead II phosphate to create lead metal to cobalt II phosphate d. How many moles of Lead II phosphate were used if 759 g of Cobalt II phosphate were produced? = moles Pb 3 (PO 4 ) 2 759 g Co 3 (PO 4 ) 2 2.07 Units match 1 mole Co 3 (PO 4 ) 2 366.92g Co 3 (PO 4 ) 2 1 mol Co 3 (PO 4 ) 2 1 mol Pb 3 (PO 4 ) 2 759 X 1 = 759 366.92 X 1 = 366.92 _____Co + _____Pb 3 (PO 4 ) 2  _____Pb+ _____Co 3 (PO 4 ) 2 33

Nickel metal reacts with aluminum sulfate creates aluminum metal and nickel IV sulfate a. How many moles of nickel were used to create 42.5 moles of nickel IV sulfate? = moles Ni 42.5 moles of Ni(SO 4 ) 2 42.5 Units match 3 mol Ni(SO 4 ) 2 3 mol Ni _____Ni + _____Al 2 (SO 4 ) 3  _____ Al+ _____ Ni(SO 4 ) 2 3234

Nickel metal reacts with aluminum sulfate creates aluminum metal and nickel IV sulfate b. How many moles of Aluminum sulfate were used to create 0.0362 moles of aluminum metal? = moles Al 2 (SO 4 ) 3 0.0362moles of Al 0.0181 Units match 4 mol Al 2 mol Al 2 (SO 4 ) 3 _____Ni + _____Al 2 (SO 4 ) 3  _____ Al+ _____ Ni(SO 4 ) 2 3234

Nickel metal reacts with aluminum sulfate creates aluminum metal and nickel IV sulfate c. How many moles of Nickel IV sulfate were produced if 15.0 g of Aluminum sulfate were used? _____Ni + _____Al 2 (SO 4 ) 3  _____ Al+ _____ Ni(SO 4 ) 2 3234 = moles Ni(SO 4 ) 2 15.0 g Al 2 (SO 4 ) 3 0.0658 Units match 1 mole Al 2 (SO 4 ) 3 342.147 g Al 2 (SO 4 ) 3 2 mol Al 2 (SO 4 ) 3 3 mol Ni(SO 4 ) 2 15.0 X 3 = 45 342.147 X 2 = 684.294

Nickel metal reacts with aluminum sulfate creates aluminum metal and nickel IV sulfate d. How many moles of nickel were used if 95.0 g of Aluminum were produced? _____Ni + _____Al 2 (SO 4 ) 3  _____ Al+ _____ Ni(SO 4 ) 2 3234 = moles Ni 95.0 g Al 2.64 Units match 1 mole Al 26.982 g Al4 mol Al 3 mol Ni 95.0 X 3 = 285 26.987 X 4 = 107.95

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