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

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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