Presentation is loading. Please wait.

Presentation is loading. Please wait.

Stoichiometry - House Method 1. Start with a balanced chemical equation. Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO 3.

Similar presentations


Presentation on theme: "Stoichiometry - House Method 1. Start with a balanced chemical equation. Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO 3."— Presentation transcript:

1 Stoichiometry - House Method 1. Start with a balanced chemical equation. Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO 3

2 Stochiometry - House Method 2. Place the given information above the proper compounds in the equation; except for moles. Moles will be written below the proper compounds!! Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO gX g

3 Stochiometry - House Method 3. Draw a simple house around each compound used in the problem. Add moles to the downstairs of each house. Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO gX g mole

4 Stochiometry - House Method 4. Draw arrows to show the path of the conversion from beginning to end. Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO gX g mole

5 Stochiometry - House Method 5. Set up your factor label conversions in the direction of the arrows. Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO gX g mole 120 g Na 2 CO 3 X 1 mol Na 2 CO 3 X mol NaOH X g NaOH = g Na 2 CO 3 mol Na 2 CO 3 1 mol NaOH Notice that there are no numbers in front of the mol to mol conversion…YET !

6 Stochiometry - House Method 6. The numbers in front of the mol to mol conversion are the addresses (coefficients) of the compounds. Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO gX g mole g Na 2 CO 3 X 1 mol Na 2 CO 3 X mol NaOH X g NaOH = g Na 2 CO 3 mol Na 2 CO 3 1 mol NaOH 2121

7 Stochiometry - House Method 7. Solve the math. Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO gX g mole 120 g Na 2 CO 3 X 1 mol Na 2 CO 3 X mol NaOH X g NaOH = g Na 2 CO 3 mol Na 2 CO 3 1 mol NaOH g NaOH

8 Stoichiometry- In Review….. -calc. of quantities in BALANCED chemical equations.

9 Mole Ratio/ Mole Bridge - Must have balanced equation - Use coefficients from balanced equation - Used to get from one substance to another Set- Up: # mole of unknown substance #mole of given substance # of moles = Coeff. from balanced equation

10 For Stoichiometry Problems (A Step-by-Step Guide!!!): 1. Balance the equation 2. Write given and unknowns with the houses. 3. If given is not in moles, convert to moles. 4. Do MOLE BRIDGE 5. If solving to moles, you're done!! 6. If solving to any other unit, do one more conversion to solve to the proper unit.


Download ppt "Stoichiometry - House Method 1. Start with a balanced chemical equation. Na 2 CO 3 + Ca(OH) 2 2 NaOH + CaCO 3."

Similar presentations


Ads by Google