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Entry Task: Feb 11 th Monday Write the question down: Find the empirical formula of a compound containing: 37.5 % C, 12.6 % H, and 49.9% oxygen. You have.

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Presentation on theme: "Entry Task: Feb 11 th Monday Write the question down: Find the empirical formula of a compound containing: 37.5 % C, 12.6 % H, and 49.9% oxygen. You have."— Presentation transcript:

1 Entry Task: Feb 11 th Monday Write the question down: Find the empirical formula of a compound containing: 37.5 % C, 12.6 % H, and 49.9% oxygen. You have ~10 minutes!

2 Agenda: Go over Empirical Formula ws #2 HW: Empirical Formula pre-lab questions

3

4 Empirical Formula Find the empirical formula of a compound containing: 3.06 % Hydrogen, % Phosphorus, and % Oxygen g of Hydrogen 1 mole of H g of H = 3.04 Moles of Hydrogen g of Phosphorus 1 mole of P g of P = 1.02 Moles of Phosphorus g of Phosphorus 1 mole of O g of O = 4.08 Moles of Oxygen

5 Empirical Formula 3.04 Moles of Hydrogen = 2.98 Moles of Hydrogen Second: Take the smallest mole amount and divided it into all others Moles of Phosphorus 4.08 Moles of Oxygen = 4 Moles of Oxygen 1.02 Moles of Phosphorus H 3 PO Moles of Phosphorus = 1 Moles of Phosphorus 1.02 Moles of Phosphorus

6 Empirical Formula Find the empirical formula of a compound containing: % Sodium, % Carbon, 3.66 % Hydrogen, and % Oxygen g of Sodium 1 mole of Na 22.9 g of Na = 1.22 Moles of Sodium g of Carbon 1 mole of C g of C = 2.44 Moles of Carbon

7 Empirical Formula Find the empirical formula of a compound containing: % Sodium, % Carbon, 3.66 % Hydrogen, and % Oxygen g of Hydrogen 1 mole of H g of H = 3.63 Moles of Hydrogen g of Oxygen 1 mole of O g of O = 2.44 Moles of Oxygen

8 Empirical Formula 2.44 Moles of Carbon = 2.0 Moles of Carbon Take the smallest mole amount and divided it into all others Moles of Sodium 3.63 Moles of Hydrogen = 2.97 Moles of Hydrogen 1.22 Moles of Sodium C 2 H 3 O 2 Na 2.45 Moles of Oxygen = 2.00 Moles of Oxygen 1.22 Moles of Sodium = 1 Moles of Sodium 1.22 Moles of Sodium

9 Empirical Formula Find the empirical formula of a compound containing: % Potassium, % Manganese, and % Oxygen g of Potassium 1 mole of K g of K = Moles of Potassium g of Manganese 1 mole of Mn 54.9 g of Mn = Moles Manganese g of oxygen 1 mole of O g of O = 2.5 Moles of Oxygen

10 Empirical Formula Moles of Manganese = 1 Moles of Manganese Second: Take the smallest mole amount and divided it into all others Moles of Potassium 2.5 Moles of Oxygen = 3.98 or 4 Moles of Oxygen Moles of Potassium KMnO Moles of Potassium = 1 Moles of Potassium Moles of Potassium

11 Empirical Formula Find the empirical formula of a compound containing: % Sodium, % Silicon, and % Oxygen g of Sodium 1 mole of Na 22.9 g of Na = 1.64 Moles of Sodium g of Silicon 1 mole of Si g of Si = Moles of Silicon g of oxygen 1 mole of O g of O = 2.45 Moles of Oxygen

12 Empirical Formula 1.64 Moles of Sodium = 2 Moles of Sodium Second: Take the smallest mole amount and divided it into all others Moles of Silicon 2.45 Moles of Oxygen = 2.99 or 3 Moles of Oxygen Moles of Silicon Na 2 SiO Moles of Silicon = 1 Moles of Silicon Moles of Silicon

13 Empirical Formula Find the empirical formula of a compound containing: % Nitrogen, 6.06 % Hydrogen, 24.24% Sulfur, and % Oxygen g of Nitrogen 1 mole of N g of N = 1.51 Moles of Nitrogen g of Hydrogen 1 mole of H g of H = 6.01 Moles of Hydrogen

14 Empirical Formula Find the empirical formula of a compound containing: % Nitrogen, 6.06 % Hydrogen, 24.24% Sulfur, and % Oxygen g of Sulfur 1 mole of S g of S = Moles of Sulfur g of Oxygen 1 mole of O g of O = 3.03 Moles of Oxygen

15 Empirical Formula 1.51 Moles of Nitrogen = 2.0 Moles of Nitrogen Take the smallest mole amount and divided it into all others Moles of Sulfur 6.01 Moles of Hydrogen = 7.95 or 8 Moles of Hydrogen Moles of Sulfur N 2 H 8 SO Moles of Oxygen = 4 Moles of Oxygen Moles of Sulfur = 1 Moles of Sulfur Moles of Sulfur

16 DO THE PRELAB!!!!


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