DECEMBER 7

Today in class we were interrupted by an earthquake!!!!.... a fake one ofcourse !
After the class got settled we quickly started our LAB :) -->DILUTION AND CREATING SOLUTIONS

Mr. Doktor gave us our last set of notes before our exam.

FINDING MOLECULAR FORMULAS
-you need the empirical formula and molar mass

Example: The empirical formula for a compound is CH2O and the molar mass is 60.0 g/mol. Find the molecular formula (work is shown below)



Example: The empirical formula for a compound is C2H6O and the molar mass is 138g/mol. Find the molecular formula. (work is shown below)

STOCK SOLUTION

--are con'c solutions from suppliers

12 M HCl

15M HNO3

18M H2SO4

Homework: STUDY FOR TEST (thursday, December 10)

WHAT DOES THE TEST CONSIST OF?

-all mole conversions<---avogadro's number

-empirical formulas

-percent mass & percent composition

-concentration

-molar volume

-dilution

-molecular formulas