CHEM 1001 Lecture Notes - Lecture 4: Chemical Formula, Horse Length, Chemical Equation

• School: Carleton University
• Department: Chemistry
• Course: CHEM 1001
• Professor: Bob Burk

Document Summary

Chemical problem solving: determine what"s being asked, visualize the problem, organize the data. Solve for what is asked: substitute and calculate, reflect on the outcome. A technician used a sections of glass tubing to measure density of a liquid (a). The inside diameter of tubing was 0. 87 mm. An empty piece of tubing weighed 0. 785 g. when liquid drawn into the tube to a height of 4. 0 cm, the tubing and liquid weighed 0. 816 g. solve for density of the liquid. Inner diameter of tubing = 0. 87 mm. Step 4: identify the process needed to solve. Mass can be determined from masses given (full empty = liquid mass) Need volume of liquid: can use volume of a cylinder equation. All values need to be in the same units before calculating. But we want the volume in liters so we convert; ml. The final sf is based off the original data, therefore 2 sf.