determination of a chemical formula

# determination of a chemical formula - Date Performed Date...

This preview shows pages 1–2. Sign up to view the full content.

Date Performed: 9/19/2011 Ann Forrest Date Submitted: 9/25/2011 Partner: Eunbeul An Instructor: Emily Klein Determination of a chemical formula Objective To determine the percentage composition and simplest formula for an oxide of copper by its reduction with methane gas (CH 4 ) at approximately 500°C. This is a study of stoichiometry. Experimental Data Mass of empty test tube: 17.47 g Mass of test tube+ Copper Oxide: 19.42 g Mass of Copper Oxide: 1.95 g Mass of test tube +Copper: 19.03 g Mass of Copper: 1.56 g Mass of Oxygen: 0.39 g Sample Calculations 1. Mass of Copper: mass of test tube and copper- mass of empty test tube 19.03g-17.47g= 1.56g Cu 2. Mass of Oxygen: Mass of Copper Oxide- Mass of Copper 1.95g- 1.56g= 0.39g O 3. Mass percent: mass of element(g)/ total mass of sample(g) x100 Mass percent of Copper: mass Cu/mass of Copper Oxide x 100 1.56g/1.95g x 100= 80.0% Cu Mass percent of Oxygen: mass O/mass of Copper Oxide x 100 0.39g/1.95g x 100= 20.0% O

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 10/23/2011 for the course ECON 101 taught by Professor Mr.calhoun during the Spring '11 term at Alcorn State.

### Page1 / 2

determination of a chemical formula - Date Performed Date...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online