Laboratory Techniques

Question 1

Name glass ware from least to most accurate

Answer 1

beaker,erlynmeiger flask,graduated cylender,burette,volumetric flask,volumetric pipet

Question 2

One of the many uses of a lab coat is protection against

Answer 2

alpha radiation caused by alpha particles that resemble a helium nucleus as they are composed of two protons and two neutrons, they are the largest radioactive particles and have the lowest penetrance and can be repelled by a lab coat.

Question 3

Burets

Answer 3

are prices of laboratory equipment that are primarily used in tritylations to deliver specific precise amounts of liquid titrant. A burette contains a stopcock along its side. It is graduated in 1.0 mL incremements so the liquid volume measurmeents always read 2 decimals places to all burets to be versitile at reading decimal volumes.

Question 4

Beaker

Answer 4

used to transfer liquids, the mixture of liquid, or for reactions. They are NOT accurate and should not be used for measurement

Question 5

Volumetric Pipet

Answer 5

is recognized to be the best tool for measurement and transfer but it only holds set amounts of volume. So a 25mL volumetric flask can only the best to measure 25mL as volume not a number so specific as 11.57mL

Question 6

Erlenmeyer flask

Answer 6

use to trasfer liuwids, a mixture of liquids or for reacctions. They are NOT accuret

Question 7

Graduated cylinder

Answer 7

they are used for transfer of liquids, mixtures of liquid, or reactions NOT accurent

Question 8

Spectorphotometer

Answer 8

measures the concentration of a solution. Light is shown through a solution some of the lights is abs by the solution and the spectrophotomeeter measures the amout of lights abs by measureing the amought of abs of light the concentration can be determined

Question 9

Distillation

Answer 9

separating two unknown substances

Question 10

Polarimetry

Answer 10

identifitying chirality and the enantiomer

Question 11

Melting point Apparatus

Answer 11

determines the melting point of a solid compound

Question 12

Allotrope

Answer 12

structural forms of the same element

Question 13

mixture

Answer 13

containes 2 or more pure substances

Question 14

group 2 elements

Answer 14

alkaline earth metals

Question 15

sublimation

Answer 15

transition from solid to gas without passing through an intermediate phase. Occurs at the edothermic phase below the triple point

Question 16

What is Avogadros number and what does it mean

Answer 16

number of moles and it is 6.02x10x23