chem lab

CHM 117 Experiment 1 Spring 2018

Name: Section:

Scientific Measurements Post-Lab Report

Measuring Solids (a) Report the collected data with the correct uncertainty.

dimensions (cm)

material length depth width mass(g)

(b) Calculate the volume of the objects and its uncertainty (Show one sample calculation).

(c) Report the volumes with the correct uncertainty.

material volume (cm3)

(d) Calculate the density and its uncertainty (Show one sample calculation).

(e) Report the density with the correct uncertainty.

material density (g/cm3)

CHM 117 1 Spring 2018

CHM 117 Experiment 1 Spring 2018

Measuring Liquids (a) Report the collected data with the correct uncertainty.

instrument volume (mL) mass (g)

10-mL cylinder

50-mL cylinder

50-mL beaker

(b) Calculate the density of water for each case and its uncertainty.

(c) Report the density with the correct uncertainty.

instrument density (g/cm3)

10-mL cylinder

50-mL cylinder

50-mL beaker

Combining Measurements to Determine the Density of a Solid (a) Report the collected data with the correct uncertainty.

mass(g) volumes (mL)

cyl. + water cyl. + water + pellets cyl. + water cyl. + water + pellets

(b) Calculate the density of metal and its uncertainty.

CHM 117 2 Spring 2018

CHM 117 Experiment 1 Spring 2018

Using the Density of a Solid to determine its dimensions. (a) Report the collected data with the correct uncertainty.

mass (g) length (cm) width (cm) density (g/cm3)

(b) Calculate the thickness of the Aluminum foil and its uncertainty.

Measuring the Mass by Difference (a) Report the collected data with the correct uncertainty.

mass(g)

beaker sugar beaker + sugar

(b) Calculate the mass of sugar from the masses of the beaker+sugar and the mass of the beaker

(c) Report the masses of sugar determine directy and by difference.

method mass(g)

Direct measure

By difference

(d) Compare the uncertainties.

CHM 117 3 Spring 2018