Percent Composition Stoichiometry February 5, 2018 Learning Target: I can formulate and calculate percent composition of molecules

Do Now (4 min) How many H’s are in H2O? How many H’s are in (NH4)2SO4? February 5, 2018 Learning target: I can formulate and calculate percent composition of molecules Do Now: (Answer on your Do Now Sheet) How many H’s are in H2O? How many H’s are in (NH4)2SO4? Learning Target: I can formulate and calculate percent composition of molecules

Announcement Between now and February 15 (Thurs): 1 pop quiz left! Stoichiometry exam: Thursday, February 15th Lab 13: Hydrates – WEDNESDAY!!! February 7th Learning Target: I can formulate and calculate percent composition of molecules

Part A: Molar mass of Compounds February 5, 2018 Part A: Molar mass of Compounds 2 minutes: Calculate the Molar Mass: a) SiF4 ________________ B) KOH _________________ C2H6 __________________ d) Ca(NH4)2 __________________ Learning Target: I can formulate and calculate percent composition of molecules

Part B: Percent composition February 5, 2018 Part B: Percent composition Chemistry reference table: Table T % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠= 𝑚𝑎𝑠𝑠 𝑜𝑓 𝑝𝑎𝑟𝑡 𝑚𝑎𝑠𝑠 𝑜𝑓 𝑤ℎ𝑜𝑙𝑒 ∗100 Composed of: 33% sugar 33% spice 33% everything nice Learning Target: I can formulate and calculate percent composition of molecules

Part B: Percent composition February 5, 2018 Part B: Percent composition 2 minutes: Solve: 2 a – c A) what is the mass of just the H’s in CH4 : _______________________ B) what is the mass of just the O’s in CO2 : ______________________ C) what is the mass of just the H’s in (NH4)2S : ____________________ Learning Target: I can formulate and calculate percent composition of molecules

Part C: Percent Composition Calculations February 5, 2018 Part C: Percent Composition Calculations Calculate the percent composition of carbon for the following compounds. A) CaCO3 % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶= 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶𝑎𝐶𝑂3 ∗100 % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶= 12.01 𝑔 100 𝑔 ∗100=12% 𝐶 Learning Target: I can formulate and calculate percent composition of molecules

Part C: Percent Composition Calculations February 5, 2018 Part C: Percent Composition Calculations Calculate the percent composition of carbon for the following compounds. B) CH4 % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶= 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶𝐻4 ∗100 % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶= ∗100=_____________ % 𝐶 Learning Target: I can formulate and calculate percent composition of molecules

Part C: Percent Composition Calculations February 5, 2018 Part C: Percent Composition Calculations Calculate the percent composition of carbon for the following compounds. Sn(CO3)2 d) C2H4 * Complete question 4 if you finish early!!! Learning Target: I can formulate and calculate percent composition of molecules

Part C: Percent Composition Calculations February 5, 2018 Part C: Percent Composition Calculations Calculate the percent composition for each element in C6H12O6 glucose. Learning Target: I can formulate and calculate percent composition of molecules

February 5, 2018 Exit ticket (3 min) EXIT TICKET: complete on a separate sheet of paper: What is the percent composition of each element in in FeCl3? Learning Target: I can formulate and calculate percent composition of molecules