Pre-Lab: Techniques and Safety Lab

Are you ever allowed to work in the lab on your own? (This is not on the lab document, but we did discuss it with the safety contract)

• Yes
• No
• Only if the teacher says it's ok

What should you do with excess (extra/unused) chemicals after you've used what you need? (This is in the procedure a couple times)

• Put it in the appropriate waste container

• Put it back in the original (stock) container

• Wash it down the drain

• Throw it in the trash

• Leave it for the next class to use

What questions should you be able to answer by the end of the lab? Choose all that apply

• How can the mass of an object be measured?

• How can the volume of a liquid be measured?

• How can a mixture be separated?

• None of these

According to the lab document, what are the objectives of this lab? (Include the extension) Choose all that apply

• Measure the mass of solid substances

• Measure the volume of water

• Separate components of a mixture through filtration.

• Calculate accuracy of experiment

• None of these

What materials can be found at your lab station?

• Table Salt, Sand, Tap Water, 100-mL graduated cylinder, 250-mL beakers (2), 50 or 100 mL beaker, Balance, Ring Stand, Ring, Funnel, Scoopula (2), Stirring rod, Filter Paper, Weighing Boat, Water Bottle, Watch Glass

• Tap Water, Balance, Funnel, Scoopula (2), Stirring rod, Water Bottle, Watch Glass

• Salt and Sand

• Water only

Each measurement you record should include a number (magnitude) and a __________.

• measurement

• negative

• unit

Approximately how much sand are you weighing out to put in the mixture? (include units!)

• 3.0 mL

• 50 mL

• 3.0 g

• 50 g

• 250 mL

Approximately how much salt are you weighing out to put in the mixture? (include units!)

• 3.0 mL

• 50 mL

• 3.0 g

• 50 g

• 250 mL

What container will you put the sand and salt into after you weigh them out? (select one size and one type)

• 50 mL

• 250 mL

• 80 mL

• Beaker

• Graduated Cylinder

How much water are you using in your mixture? (include units!)

• 100 mL

• 80 mL

• 3.0 g

• 250 g