Chem Lab Lecture3

Chem Lab Lecture3 - of the balance as ±0.01 g(ChemP 201...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
CuO lab 1 of 4 Determination of a Chemical Formula There are two oxides of copper: The copper in the oxide can be reduced to the free metal using the reducing agent methane, CH 4 . Reduction is the process in which the Cu 2+ or Cu + ion gains electrons to become a neutral atom. The reducing agent CH 4 provides those electrons. The two reactions are: Notice:
Background image of page 1

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

View Full DocumentRight Arrow Icon
CuO lab 2 of 4 In this lab exercise, you will determine which copper oxide you have by performing the reduction. You will know: Mass of copper oxide: Mass of copper: Mass of oxygen: Calculate the uncertainty associated with these masses by using the uncertainty
Background image of page 2
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: of the balance as ±0.01 g (ChemP 201, 202, 209) or ±0.001 g (ChemP 213, 217) and using the equation: (see page 221 for example) CuO lab 3 of 4 Calculate mass percents of copper and oxygen: % Cu = % O = Assuming a 100 g sample, calculate the moles of copper and oxygen: m o l e s C u = m o l e s O = Find the atom ratio: NOTE: CuO lab 4 of 4 Calculate uncertainties in mass%, moles and atom ratio using (since you are dividing): (See page 221-222 for example) Experimental Notes: • • •...
View Full Document

This note was uploaded on 03/19/2008 for the course CHEM 1045 taught by Professor Pgamateis during the Spring '08 term at Virginia Tech.

Page1 / 4

Chem Lab Lecture3 - of the balance as ±0.01 g(ChemP 201...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online