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science grade 10 > Chemistry test #2 > Flashcards

Chemistry test #2 Flashcards

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1
Q

What is a weak acid/base and what is a strong acid/base

A

weak acid : Ph 4-6 (close to neutral)
Strong acid : PH 0-4 (far from neutral)

Weak Base : PH 7-10 (close to neutral)
Strong Base : PH 11-14 (far from neutral)

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2
Q

what does it mean if a substance is neutral

A

It has a PH value of 7

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3
Q

What is a chemical reaction

A

Process that changes chemicals starting materials (reactants) into something new (products)

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4
Q

What are reactants

A

Your starting materiel is a chemical reaction

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5
Q

what are products

A

your ending materiel in a chemical reaction

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6
Q

What is Synthesis

A

Combining element and or compounds in a larger compound

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7
Q

what is Decomposition

A

A type of reaction that would break down a compound into elements

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8
Q

What is double displacement

A

Elements of different compounds displace each other by changing places

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9
Q

What is Single Displacement

A

One element Displaces or replace another from a compound

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10
Q

What is neutralization

A

Reaction between an acid and a base, Type of double displacement

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11
Q

What is a Diatomic Molecule

A

Kind of molecule made of 2 bonded atoms of the same element

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12
Q

What does exothermic mean

A

When temperature increases, The reaction produces heat

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13
Q

What does endothermic mean

A

When temperature decreases, the reaction requires energy

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14
Q

What is a chemical change

A

Changed the kind of particle presented
e.g. burning paper turns in to ash and smoke

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15
Q

What is GHS

A

Globally Harmonized Symbols
symbols found on dangerous products used at work

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16
Q

What is HHPS

A

Hazardous House Product Symbols
Symbols found on dangerous substances found at home

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17
Q

Balancing Strategies

A
  1. Balence metal elements
  2. balance non-metal elements (not H and O)
  3. Balance H and O
  4. Double check
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18
Q

Some elements can’t be a single atoms

A

H, O,F,Br,I,N,Cl

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19
Q

Difference between PH paper and litmus paper

A

PH paper tells you its PH value and if it is a strong or weak acid/base
Litmus paper only tells you if it is an acid or base

20
Q

Litmus paper rules

A

Blue Litmus Paper :
Turns blue = base
turns red = acid

Red Litmus Paper :
Turns blue = base
turn red = acid

21
Q

Formation of gas using splints

A

Oxygen = glowing splint and it will relight
Carbon Dioxide = burning splint and it will go out
Hydrogen + burning splint and will create mini explosion and pop noise

22
Q

Indicators of a chemical change

A
  1. Change in colour
  2. change is odour
  3. change in temperature
23
Q

HHPS symbols

A
  • toxic
  • flammable
    -corrosive
    – explosive (contents of container) ^
    explosive (container)
24
Q

what does room 2013 not have

A

spill kit and safety shower

25
Q

GHS symbols

A
  • flammable
    -corrosive
  • explosion
  • toxic
  • irritant/harmful
  • hazardous health
  • damage to environment
  • oxidizing
  • compressed gas
26
Q

who is Antoine Lavoisier

A

Discovered mass is neither created nor lost during a chemical reaction

27
Q

Who is Emil Erlenmeyer

A

created Erlenmeyer flask

28
Q

who is Robert bunsen

A

created Bunsen burner

29
Q

who is Søren Sørenson

A

created the PH scale

30
Q

Lab safety equipment

A
  • fire extinguisher
  • eye wash station
  • fume hood
  • broken glass disposal
  • spill kit
  • safety shower
  • fire alarm
31
Q

Some Lab rules

A
  • hair tied up
    -teacher supervision
    -no running
  • glasses on
  • no eating or drinking
32
Q

Comparing acid and base

A

acid:
formula always starts with H
Sour tasting
PH<7

Base:
Formula always has (OH) in it
bitter tasting
PH>7

33
Q

what is a erlenmeyer flanked used for

A

Allows mixing without spillage

34
Q

what is a watch glass used for

A

Holds small amounts of a chemical
can be put over container during reaction

35
Q

what is a test tube brush used for

A

cleaning out test tubes

36
Q

what is a graduated cylinder used for

A

measuring volume of a liquid

37
Q

morter and pestle

A

used for grinds solids a fine powder

38
Q

clay triangle

A

supports crucibles when being heated over Bunsen burner

39
Q

Test Tube Holder

A

holds ONE test tube

40
Q

Florence flask

A

round flask suited for uniform heating (named after a city in Italy)

41
Q

Tweezers

A

picked up small items

42
Q

scopula

A

dispenses a solid chemical from a container

43
Q

retort clamp or stand

A

supports holds or clamp lab equipment into place
c

44
Q

crucible clamp

A

Moves and hold a hot crucible

45
Q

beaker tongs

A

move and hold hot beakers

46
Q
A

science grade 10 (3 decks)

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