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science gr.10 > Chem culminating final lab > Flashcards

Chem culminating final lab Flashcards

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1
Q

What is the difference between molecular and ionic compounds

A

Ionic compounds contain a metal

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2
Q

Substances with a pH of 7=

A

natural

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3
Q

Substances with a pH of less than 7=

A

acidic

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4
Q

Substances with a pH of more than 7=

A

bases

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5
Q

The closer the acid/base is to 7…

A

the weaker it is

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6
Q

What are bases?

A

A substance is a base if it contains OH-

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7
Q

What colour does blue litmus paper turn when dipped in an acidic solution

A

red

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8
Q

What colour does blue litmus paper turn when dipped in a neutral/base solution

A

it stays blue

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9
Q

What colour does red litmus paper turn when dipped in a neutral/base solution

A

it stays red

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10
Q

What colour does red litmus paper turn when dipped in an acidic solution

A

blue

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11
Q

how does phenolphthalein (clear liquid) react with acids and neutral solutions?

A

Turns clear

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12
Q

how does phenolphthalein (clear liquid) react with bases?

A

turns pink

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13
Q

how does bromothymol blue react with acids

A

turns yellow

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14
Q

how does bromothymol blue react with neutral solutions?

A

turns green

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15
Q

how does bromothymol blue react with bases

A

stays blue

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16
Q

Is the melting point of ionic compounds high or low?

A

high

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17
Q

Are ionic compounds usually solid, liquid, or gas?

A

solid

18
Q

Do ionic compounds exude an odor usually

A

yes

19
Q

Are Ionic Compounds hard or soft

A

hard

20
Q

Are ionic compounds brittle or non-brittle?

A

brittle

21
Q

Are ionic compounds soluble or non-soluble

A

soluble

22
Q

Are ionic compounds conductive?

A

yes

23
Q

What is an electrolyte

A

ions

24
Q

Do covalent compounds have a high or low melting point?

A

low

25
Q

What state are covalent compounds

A

varies

26
Q

Do covalent compounds exude an odor

A

sometimes

27
Q

Are covalent compounds hard or soft?

A

Soft

28
Q

Are covalent compounds soulable

A

sometimes

29
Q

Are covalent compounds conductive?

A

No, they do not form ions

30
Q

What is a Synthesis reaction

A

Atoms or elements that are joined together to form a new compound
Has 2 or more reactants to form ONE product

31
Q

What is the general formula of a synthesis reaction

A

a+b → ab

32
Q

What is a decomposition reaction

A

a compound or molecule breaks down into 2+ simpler atoms or elements
One reactant breaks down into 2 or more products

33
Q

What is the general formula of a decompisiton reaction

A

ab → a+b

34
Q

What is a single displacement reaction

A

One element and another element in a compound
Reactants: 1 element and 1 compound
Products: 1 different element and 1 different compound

a metal can only displace another metal/cation

a nonmetal can only displace another nonmetal/anion

35
Q

What single displacement general formula for metals and non-metals

A

Metals: AB+C → CB+A
Nonmetals: AB+C → AC+B
*don’t carry subscripts through

36
Q

Double Displacement Reactions

A

elements with 2 different compounds switch places, forming 2 new compounds
2 reactants (both compounds) and 2 products (2 different compounds)

37
Q

Double Displacement general formula

A

ab+cd → ad+cb
*always metak before nonmetal

38
Q

Hydrocarbon combustion

A

combustion is the very eapid reaction of a hydrocarbon with oxygen to produce carbon dioxide, water, and energy

39
Q

What are hydrocarbons

A

Compound containing mostly H & C

40
Q

Hydrocarbon combustion general formula

A

CxHy+O2 → CO2+ H2O

41
Q

Neutealization

A

Occurs when an acid and base react
When an acid and base react, the products are water and salad

eg. HCL (aq)+ NaOH (aq) → NaCl+H2O

42
Q

If there is a compound with only carbon and hydrogen what does that mean

A

it is combustion

science gr.10 (5 decks)

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