Empirical & Molecular Formulas

Slides:

Advertisements

Similar presentations

Chapter 11 Empirical and Molecular Formulas

Advertisements

Empirical and Molecular Formulas

Determining a Compound’s Percentage Composition From its Formula Empirical, Molecular, & Structural Formulas Determining a Compound’s Empirical Formula.

Empirical and Molecular Formulas

Percent Composition, Empirical Formulas, Molecular Formulas

Warm-Up: To be turned in 3.6 mol NaNO 3 = ______ g g MgCl 2 = ______ mol.

Empirical Formulas 4/1 - ATB: If an unknown sample has 1 mole of H and 1 mole of Cl, what would be the formula of this compound?

The Mole and Chemical Composition

Empirical & Molecular Formulas

Empirical Formula Molecular Formula

Unit Empirical and Molecular Formulas. Empirical Formulas Consists of the symbols for the elements combined in a compound, with subscripts showing.

Chemistry Empirical and Molecular Formulas. Objectives n Students will be able to: n Determine the empirical formula of a compound n Determine the molecular.

Empirical & Molecular Formulas. Percent Composition Def – the percent by mass of each element in a compound Percent by mass = mass of element x 100 mass.

Starter  Finish the study guide from yesterday. Ch. 7B Using Chemical Formulas 7B.4 Determining Molecular Formulas.

USING MOLAR CONVERSIONS TO DETERMINE EMPIRICAL AND MOLECULAR FORMULAS.

Molecular Formula. Compare mass of empirical formula to formula mass of molecule X (empirical formula) = (molecular formula)‏

Calculating Empirical Formulas

Percent Composition What is the % mass composition (in grams) of the green markers compared to the all of the markers? % green markers = grams of green.

Percentage Composition Sec 7.3. Percentage Composition Review –What does the formula H 2 O tell us? –What does % mean? –You get 7 out of 10 on a test.

Percent Composition.  We go to school for 180 days a year. What % of the year are we in school? Similar to finding % in any other situation.

Percent Composition Determine the mass percentage of each element in the compound. Determine the mass percentage of each element in the compound. Mass.

Percent Composition KMnO 4. Percent Composition (NH 4 ) 3 PO 4.

And Empirical Formula.  Determine the mass percentage of each element in the compound.

Unit V: The Mole Concept

Empirical Formula.

Empirical Formula: Smallest ratio of atoms of all elements in a compound Molecular Formula: Actual numbers of atoms of each element in a compound Determined.

Percent Composition, Empirical and Molecular Formulas

Calculating Molecular Formulas

6.7 Empirical Formula and 6.8 Molecular Formulas

Empirical Formula.

Empirical and Molecular Formulas

Empirical and Molecular Formulas

Percent Composition & Empirical and Molecular Formulas

The Mole Formula Calculations.

Empirical Formula and Molecular Formula

You need a calculator AND periodic table for today’s notes

Empirical Formula Molecular Formula

Section 3.2 Stoichiometry and Compound Formulas

Empirical formula – the chemical formula of a compound written using the smallest, whole number, mole ratio between atoms in the compound. What is the.

Stoichiometry… Continued

Ch. 8 – The Mole Empirical formula.

Empirical and Molecular Formulas

Empirical and Molecular Formulas

7.5 – NOTES Molecular Formulas

Empirical and Molecular Formulas

Empirical and Molecular Formulas

Empirical Formulas Unit 5.

mole (symbolized mol) = 6.02 x particles

EMPIRICAL FORMULA The empirical formula represents the smallest ratio of atoms present in a compound. The molecular formula gives the total number of atoms.

Ch. 8 – The Mole Empirical formula.

molecular formula: a whole-number multiple of an empirical formula…

Vocabulary Percent Composition -

% Composition, Empirical Formulas, & Molecular Formulas

% Composition, Empirical Formulas, & Molecular Formulas

From percentage to formula

Empirical and Actual Formulas

Empirical and Molecular Formulas

Chemical, Empirical, and Molecular Oh My!

Empirical and Molecular Formulas

Warm Up #5 Find the percent composition of the following:

Empirical Formula of a Compound

Calculating Empirical and Molecular Formulas

Empirical and Molecular Formulas

Chapter 11: More on the Mole

7.3 – NOTES Molecular Formulas

Calculating Empirical and Molecular Formulas

Empirical and Molecular Formulae

Molecular Formula.

Chemical Formulas Tell type & number atoms in compound

Empirical Formulas, Hydrates, and Molecular Formulas

Presentation transcript:

Empirical & Molecular Formulas Empirical Formulas Smallest, whole # ratio of atoms in a molecule Ex: NaCl, H2O, C12H22O11 not necessarily the actual formula for the compound Ex: CH2O  C6H12O6 Molecular Formulas Actual formula for the compound

Empirical & Molecular Formulas Ex 1: Determine the empirical formula of the compounds with the following composition by mass: 10.4% C, 27.8% S and 61.7% Cl

Empirical & Molecular Formulas Ex 2: Determine the empirical formula of the compounds with the following composition by mass: 21.7% C, 9.6% O and 68.7% F.

Empirical & Molecular Formulas Ex. 3: Give the empirical formula of each of the following compounds if a sample contains: 40.0% C, 6.7% H and 53.3% O by mass.

Empirical & Molecular Formulas Ex. 4: Give the empirical formula of each of the following compounds if a sample contains: 11.66g Iron and 5.01g Oxygen

Empirical & Molecular Formulas Ex. 5: What is the molecular formula of each of the following compounds? empirical formula CH molar mass = 78 g/mol

Empirical & Molecular Formulas Ex. 5: What is the molecular formula of each of the following compounds? empirical formula CH molar mass = 78 g/mol

Empirical & Molecular Formulas When the hydrated form of Li2SiF6 is heated, its mass decreases of 0.4813 to 0.3910g. Determine the formula for the hydrate, and name the hydrate.

Empirical & Molecular Formulas When the hydrated form of Li2SiF6 is heated, its mass decreases of 0.4813 to 0.3910g. Determine the formula for the hydrate, and name the hydrate.