INORGANIC CHEMISTRY MIDTERMS

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Solids

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BSMT1-L1, SLOBINGUAR | Contents: Lab safety rules, system of measurement, parts of bunsen burner, matter, separation techniques, lab instruments, combustion

212 Terms

1

Solids

In handling, scooping, or pouring from their containers, they should be shaken or loosen first

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2

Bottle caps

These should be placed upside down on the desk or held in between fingers when not in use to prevent contamination

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3

Stirring rod and funnel

These can be used to transfer liquids from containers that does not have spout to direct their flow

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4

Bumping

The sudden release of vapor caused by over-heating

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5

Anti-bumping granules

Aside from stirring rods or broken ceramic, these pieces of chips can be placed in liquids to avoid bumping

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6

Test tubes

These should be moved up and down while heating to avoid bumping

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7

Colored liquids

When measuring their volume, you should read right at the upper meniscus

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8

Clear liquids

When measuring their volume, you should read right at the lower meniscus

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9

Eye level

When measuring volume, this is how you should read the result

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10

Aspirator

A rubber apparatus that is used to suction liquids with a pipette

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11

Index finger

The finger that is used to cover the tip of the pipet to hold or release liquids

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12

Contamination

This is what is lessened when you dont let the tip of the pipette touch the bottom of the container

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13

Shake

This is what you should not do to a pipette to get its last drop

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14

Clean

You should make sure that your plate or pan is ____ before using scales

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15

Zero adjust knob

This is what you should focus on when you want to obtain zero reading

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16

Poise

These should be adjusted to zero before using scales

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17

Pointer or beam

This should swing to zero on the center mark

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18

Weighing containers

These are what you should use along with the scale when you want to measure weight

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19

Thermometer

A device that measure temperature

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20

Mercury thermometer

A thermometer with a silver tip

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21

Alcohol thermometer

A thermometer with a red tip

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22

Dilution

A process that turns a concentrated liquid into a less concentrated one

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23

3AW

A rule that should be strictly followed when doing an acid dilution

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24

Water

This is a solvent that should not be added to acids to prevent unwanted reactions

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25

Sedimentation

A process of allowing particles in the water to settle out of the suspension due to gravity

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26

Sediment

A product obtained after letting mixtures settle down

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27

Decantation

A process that separates liquids from solids or liquids by removing the liquid layer at the top from the layer at the bottom

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28

Filtration

A process that separates solids from liquids or gases using a filter medium that allows the fluid to pass through but not the solid

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29

Filter paper

a piece of semi-permeable paper that is commonly used in filtration

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30

Filtrate

The liquid obtained after filtration

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31

Residue

The solid substances that were filtrated

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32

Sublimation

A phase-change separation that turns solid to gas immediately without passing through the liquid state

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33

High pressure

This is what a mixture should have to undergo sublimation

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34

Iodine

An example of a dark liquid that can easily go though sublimation.

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35

Centrifugation

A process that separates solid to liquid by spinning them around an axis at high speed

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36

Mother liquor

The liquid obtained after centrifugation

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37

Evaporation

A process that turns liquid to gas through the use of heat

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38

Distillation

A process that separates components of from a liquid through selective boiling or evaporation and condensation

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39

Distillate

The liquid obtained after distillation

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40

Chromatography

A process that separates the minute components of a mixture between two phases: stationary and mobile

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41

Stationary phase

A phase in chromatography that is fixed

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42

Mobile phase

A phase in chromatography that carries the components of the mixture through a medium

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43

Measurement

Process of quantifying the properties of an object by expressing them in terms of a standard unit

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44

English System

A unit system that started due to the widespread trading in a lot of countries (US, British empire)

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45

Imperial system

The other term for English system

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46

Metric system

The decimal system of weights and measures

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47

Base unit

This is what each of the measures of the metric system have

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48

10

The metric system is divided by the power of ___

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49

Prefix

This part of the unit name of the metric system indicates whether the unit is smaller or larger than the base unit

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50

Chemistry

The study of matter and the changes it undergoes

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51

Chemistry

It is also called as "central science" since it bridges physics with other natural sciences

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52

International System of units

The modern form of metric system

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53

SI unit

The other term for the most used system of measurement

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54

Meter

The base unit of length or distance

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55

Liter

The base unit of volume or capacity

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56

Gram

The base unit of mass or weight

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57

Second

The base unit of time

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58

Degree Celsius

The base unit of temperature

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59

Mass

The measure of the amount of matter in an object

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60

Weight

The force that matter feels due to gravity

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61

Conversion factor

A term that converts a quantity in one unit to a quantity in another unit

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62

Factor-label method

The use of conversion factors to convert a quantity in one unit to a quantity in another unit

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63

Cancel

This is what you should do to unwanted units

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64

Temperature

The measure of how hot or cold an object is

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65

Density

The physical property that relates the mass of a substance to its volume

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66

Specific Gravity

the quantity that compares the density of a substance with the density of water at the same temperature

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67

Exact numbers

Results from counting or part of a definition

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68

Inexact numbers

Results from measurement or observation but can contain some uncertainty

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69

Significant figures

all digits in a measured number including one estimated digit

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70

Non-zero digits

All of these are considered significant

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71

Significant

A zero is considered as ___ if it is between 2 non-zero digits

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72

Significant

A zero is considered ___ if it is at a trailing zero in a number that has a decimal place

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73

Not-significant

A zero is considered ____ if it is a leading zero

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74

Not-significant

A zero is considered ___ if it is at the end of a number that does not have a decimal point

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75

Drop

When rounding off, this is what you should do to the rounding place numbers when it is 4 or less

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76

Add 1

When rounding off, this is what you should do to the rounding place numbers when it is 5 or more

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77

Place value

the position of a digit in a number

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78

Least significant figures

In multiplying and dividing significant figures, the digits of the final answer should be the same as the number with the ____

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79

Least decimal places

In adding and subtracting significant figures, the digits of the final answer should be the same as the number with the ____

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80

Scientific notation

A method that is used to represent very large or small numbers in a simpler form

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81

Positive

When converting standard numbers to scientific notation, moving the decimal to the left signifies a ___ exponent

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82

Negative

When converting standard numbers to scientific notation, moving the decimal to the right signifies a ___ exponent

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83

Right

When converting scientific notation to standard form, a positive exponent means that you should move the decimal to the ____

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84

Left

When converting scientific notation to standard form, a negative exponent means that you should move the decimal to the ____

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85

Graduated cylinder

  • used for measuring volumes

  • has spout

  • not for mixing, stirring, heating, weighing

  • has a long neck

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86

Volumetric flask

  • measures one specific volume that is marked by the etched line on the neck

  • easy to mix solutions in because of its glass stoppers and design

  • used in preparation of solutions or precise volume

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87

Pipette

  • used for measuring specific volumes

  • used with an aspirator

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88

To deliver pipette

  • A graduated pipette that is calibrated to deliver the specified volume of liquid when properly expelled

  • the last drop of liquid should be blown out of the tip for exact measurement

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89

To contain pipette

  • A graduated pipette that is calibrated to hold the exact specified volume of liquid

  • the last drop of liquid should be blown out of the tip in a separate container

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90

Erlenmeyer flask

  • designed for easy stirring as it can be swirled by hand without spills

  • not for measuring as it has an accuracy of 5%

  • used as container with cork stopper for storage, weighing, heating, and mixing

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91

beaker

  • holds volumes of liquid

  • not for measuring as it has an accuracy of 5%

  • for heating, transferring liquids, and container for weighing

  • has a spout

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92

Test tube

  • hold and mix small samples

  • used as a reaction vessel

  • stirred by tapping the bottom with 2 fingers

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93

Test tube rack

Hold or support test tube upright when observing or drying

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94

Test tube brush

It is used to clean test tubes

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95

Test tube holder

It is used to hold test tube in place when hot or shouldnt be touched with bare hands

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96

Watch glass

A round concave glass dish that is used for evaporation, weighing, or covering other instruments

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97

Evaporating dish

-It is made of glazed porcelain or ceramic that is used to heat or evaporate samples under high heat

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98

Funnel

This is mainly used as an aid in transferring liquids

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99

Stirring rod

This is used to stir things and aid in liquid transfer

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100

Hot plate

This is used to heat volatile substances

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