DO NOW Pick up review. Get out Hydrate lab from yesterday.

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DO NOW Pick up review. Get out Hydrate lab from yesterday. Get out green periodic table and a calculator. Hydrate lab is due Monday.

LAB DATA

THE MOLE REVIEW

REVIEW FOR TEST Know the MOLE as the basic SI unit for measuring the amount of a substance. Know Avogadro’s number (6.02 x 1023) as it is related to a mole of any substance. Calculate the molar mass from the periodic table for any substance.

REVIEW FOR TEST 4. Be able to calculate percent composition using masses.

REVIEW FOR TEST 54. What is the percent composition of H3PO4? H 3 x 1.01 = 3.03 %comp = part x 100 P 1 x 30.97 = 30.97 whole O 4 x 16.00 = 64.00 98.00

REVIEW FOR TEST 5. Calculate the mole-mole, mole-mass, mass- mole, mole-particle, and particle-mole problems. How many moles of oxygen atoms are present in 5.00 mol P2O5? 5.00 mol P2O5 5 mol O = 25.0 mol O 1 mol P2O5

REVIEW FOR TEST 5. Calculate the mole-mole, mole-mass, mass- mole, mole-particle, and particle-mole problems. Calculate the number of molecules in 11.5 moles of H2O. 11.5 mol H2O 6.02 x 1023 molecules H2O 1 mole H2O = 6.923 x 1024 = 6.92 x 1024 molecules H2O Calculate the number of moles in 25.5g Ag. 25.5g Al 1 mol Al = 0.2363956 107.87g Ag = 0.236 mol Ag

REVIEW FOR TEST 6. Use the mole to convert between mass and number of particles. Calculate the number of atoms in 55.2g Li. 55.2g Li 1 mol Li 6.02 x 1023 atoms Li 6.94g Li 1 mol Li = 4.78824 x 1024 = 4.79 x 1024 atom Li Calculate the mass in grams of 6.02 x 1024 atoms Bi. 6.02 x 1024atoms Bi 1mol Bi 208.98g 6.02 x 1023 atoms Bi 1 mol Bi = 2089.8 = 2090g Bi

REVIEW FOR TEST 7. Distinguish between empirical and molecular formulas.

REVIEW FOR TEST 8. Calculate empirical formulas, molecular formulas, and hydrate formulas from appropriate data.

REVIEW FOR TEST

REVIEW FOR TEST

REVIEW FOR TEST

WHAT I WILL LOOK FOR Be sure to show all your work. Be sure to use the correct number of significant digits. Be sure to show all units and substances. Place all final answers on the line provided in the top right of the box. Remember the more you show me, the more credit I can give.

WHAT’S ON THE TEST 10 problems Mole to mole Mole  mass; mass  mole Mole  particles; particles  mole Particles  mass; mass  particles Percent composition Empirical formula Molecular formula Hydrate formula

TO DO Complete the Review. Pretend like it is your test and do EVERYTHING! Do not take short cuts. I am happy to check any of the ones you want. Due tomorrow.

DO NOW Prepare for test – calculator and something to write with. Turn in your review sheet for test redo points. NO ELECTRONIC DEVICES AT ALL (even music) during the testing time. I will take that device and give it back NEXT Friday afternoon or to your parent, whichever comes first.