Experimental design
Choosing apparatus
| Measurement | Apparatus |
|---|---|
| time | stop-watch |
| temperature | thermometer |
| mass | balance |
| accurate volume | burette or pipette |
| rough volume | measuring cylinder |
| gas volume | gas syringe |
Practice
Which apparatus measures volume most accurately?
A burette or pipette gives accurate volumes; a measuring cylinder is only rough.
Key words
- solvent — dissolves the solute.
- solute — the substance that dissolves.
- solution — solute(s) dissolved in a solvent.
- saturated solution — holds the most solute that will dissolve at that temperature.
- residue — the solid left behind; filtrate — the liquid that passes through a filter.
Practice
The substance that dissolves in a solvent is the:
The solute dissolves in the solvent to form a solution.
Practice
Match each word to its meaning.
Residue stays on the filter paper; filtrate passes through it.
You've got it
Key idea
- use the right tool: burette/pipette for accurate volume, measuring cylinder for rough
- solute dissolves in solvent to make a solution
- residue = solid left behind; filtrate = liquid through the filter