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Gr 10 Science > Chemistry > Flashcards

Chemistry Flashcards

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1
Q

Which of the following equations is balanced?
1) H2 + O2 ~> 2H2O
2) Zn + 2AgNO3 ~> Zn(NO3)2 + 2Ag
3) N2 +H2 ~> NH3
4) PbCl2 +Li2SO4 ~> LiCl 2PbSO4

A

Zn + 2AgNO3 ~> Zn(NO3)2 + 2Ag

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2
Q

Which of the following is a double displacement reaction?
1)2PbO2 ~> 2PbO +O2
2)2Al + Fe2O3 ~> 2Fe + Al2O3
3)N2 + 3 H2 ~> 2NH3
4)ZnBr2 + 2AgNO3 ~> Zn(NO3)2 + 2AgBr

A

ZnBr2 + 2AgNO3 ~> Zn(NO3)2 + 2AgBr

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3
Q

What the five clues of a chemical change?

A
  1. Colour change
  2. Formation of a precipitate
  3. Formation of a gas
  4. Odor change
  5. Temperature change
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4
Q

What are the six main catefories of reactions?

A
  1. Sythesis
  2. Decomposition
  3. Single displacement
  4. Double displacement
  5. Acid base neutralization
  6. Combustion
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5
Q

What is the formula of a synthesis reaction?

A

A + B ~> AB

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6
Q

What is the formula of a decomposition reaction?

A

AB ~> A + B

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7
Q

What is the formula of a single displacement reaction?

A

Z + AB ~> ZB + A

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8
Q

What is the formula of double displacement?

A

AB + XY ~> XB + AY

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9
Q

What is the formula of acid base neutralization

A

Acid + Base ~> Water + Salt (ionic compound)

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10
Q

What is the chemical formula of Sodium iodide?

A

Na(s) + I(s) ~> NaI(aq)

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11
Q

The decomposition of calcium carbonate is given by the equation:

CaCO3(s) ~> CaO(s) + CO2(g)

If 25 g of CaCO3 is heated to give 15 g of CaO, what mass of CO2 is also produced?

A

10 grams

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12
Q

What is the name for H2?

A

Hydrogen Gas

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13
Q

What is the name of CuSO4?

A

Copper (II) sulphate

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14
Q

What is the name of HNO3?

A

Nitric acid

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15
Q

What is the name of CCl4?

A

Carbon Tetrachloride

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16
Q

What ist he name of N2O5?

A

Dinitrogen pentoxide

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17
Q

What is the name of HF?

A

Hydrofluoric Acid

18
Q

What is the name of Ca(OH)2?

A

Calcium hydroxide

19
Q

periods are _____

A

rows

20
Q

groups are _____

A

columns

21
Q

protons. charge? location? importance?

A

positivly charged
in the nucleus
useful to find the atomic number

22
Q

neutrons. charge? location? importance?

A

neutrally charged
in the nucleus
useful to find th atomic mass (proton + neutron)

23
Q

electons. charge? location? imporantance?

A

negativly charged
orbits around the nucleus
important when bonding atoms

24
Q

What do atoms do to have a full outer shell?

A

Atoms ionize

25
Q

What may be a consequence of having farms that use fertilizers near a river?

A

Fertilizers contain a lot of chemicals, so if ferilizers are washed off crops into a nearby river. It could cause an algae boom, which means it causes lots of algae to grow, which would use more oxygen, causing fish to die, disrupting the food chain.

26
Q

What is a cation? How do you get a cation?

A

Positivly charged ion. from losing electrons

27
Q

What is a anion? How do you get a anion?

A

Negativly charged ion. from gaining electrons

28
Q

What is an application of a polyatomic ion?

A

Silver nitrite is used as a preservative and colour enhancer in hot dogs

29
Q

What is the law of conservation of mass

A

mass (and energy) cannot be created nor desdroyed

the mass and number of atoms of reactants is always equal to the mass and number of atoms of products

30
Q

What are some applications of acid-base neutailization?

A

Chemical spills: when acids are spilled it is very dangerous and unsafe to clean the subtance as an acid, so you need ot netrauilize first before cleaning the subtance.

Antacids: used to neutailize the acid in the stomach, which helps relieve indigestion

31
Q

What three things must be available for combustion to occur?

A

Heat oxygen
Fuel (Hydrocarbon)

32
Q

What are the two types of combustion?

A

complete combustion (when there is sufficient oxygen)

incomplete combustion (when there is insufficient oxygen)

33
Q

Name 3 indicators and explain how they work.

A

Litmas paper: Litmas paper has red and blue papers, used to indicate if a subtance is an acid or base. If the paper stays/turns red the subtance is acidic

Phenolpthalein: indicats whether a subtance is acidic or basic by dropping it into the subtance. If the substane is pink it is basic if it is clear then it is acidic.

Bromothymol blue: indicates if a subtance is basic or acidic by dropping the indicator into the subtance, if it turns blue it is basic and if it turns yellow it is acidic. If the substance is a dark green then the subtance is neutal.

34
Q

What is the name of H20?

A

water

35
Q

What is the name of CH4?

A

Methane

36
Q

What is teh name of NH3?

A

Ammonia

37
Q

What is the name of C3H8?

A

Propane

38
Q

What is the chemical formula for water

A

H20

39
Q

What is the chemical formula for methane

A

CH4

40
Q

What is the chemical formula for ammonia

A

NH3

41
Q

What is the chemical formula for propane

A

C3H8

Gr 10 Science (1 decks)

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