lab equipment and measurements

Lab Equipment and Lab Equipment and MeasurementsMeasurements

Graduated CylinderGraduated Cylinder Measures volume of liquidsMeasures volume of liquids Unit: liter (L)Unit: liter (L) Commonly use mL in labCommonly use mL in lab Proper Procedure: Place Proper Procedure: Place

cylinder on a flat surface, cylinder on a flat surface, get at eye level with the get at eye level with the liquid, and read the bottom liquid, and read the bottom of the of the miniscusminiscus, the curved , the curved part of the top of the liquid.part of the top of the liquid.

Correct Technique!Correct Technique!

MeniscusMeniscus

PracticePractice

BeakerBeaker Can be used to Can be used to

measure large measure large volumesvolumes, but not as , but not as accurate as a accurate as a graduated cylindergraduated cylinder

Mainly used for Mainly used for pouring and mixingpouring and mixing

Unit: Unit: mLmL

Triple-Beam BalanceTriple-Beam Balance Measures mass (amount of Measures mass (amount of

substance – how much)substance – how much) Unit: gram (g)Unit: gram (g) Procedure: Place balance on Procedure: Place balance on

a flat surface, adjust masses a flat surface, adjust masses until the arm balances. Take until the arm balances. Take the sum of the 3 masses.the sum of the 3 masses.

Practice!Practice!

More Practice!

Spring ScaleSpring Scale Measures weight Measures weight

(the force of the pull (the force of the pull of gravity on a of gravity on a substance)substance)

Unit: Newton (N)Unit: Newton (N)

Look more familiar?Look more familiar?

Meterstick or RulerMeterstick or Ruler Measures distance or Measures distance or

lengthlength Unit: meter (m), or cm Unit: meter (m), or cm

(centimeter) (centimeter) in the lab in the lab

Practice!

ThermometerThermometer

Measures temperatureMeasures temperature Unit: Kelvin (K) or Unit: Kelvin (K) or °Celcius (°C)°Celcius (°C) What do you think What do you think

would be the “proper would be the “proper procedure” for reading procedure” for reading a thermometer?a thermometer?

Stopwatch or TimerStopwatch or Timer Measures: Measures:

timetime

Unit: Unit: seconds seconds (s)(s)

Other EquipmentOther Equipment Test tubeTest tube FunnelFunnel Bunsen burnerBunsen burner Test tube clampTest tube clamp

Other Equipment (cont.)Other Equipment (cont.) Ring standRing stand Erlenmeyer Erlenmeyer

flaskflask

Dissection Equipment Forceps Teasing

needle Probe and

seeker Scalpel

IMPORTANT Prefixes Foldable IMPORTANT Prefixes Foldable KKathy athy HHas as DDirty irty UUnderwear, nderwear,

DDon’t on’t CCheck heck MMine!ine! kkilo = 1000ilo = 1000 hhecto = 100ecto = 100 ddeca = 10eca = 10 Basic Basic uunitnit ddeci = 1/10 = 0.1eci = 1/10 = 0.1 ccenti = 1/100 = 0.01enti = 1/100 = 0.01 mmilli = 1/1000 = 0.001illi = 1/1000 = 0.001