Year 9 Science Chemistry Flashcards

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1
Q

Reactants

A

chemicals mixed to make a rection occur

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2
Q

Products

A

substances produced during a reaction

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3
Q

Chemical Reactions

A

Acid +Base
Acid+Active Metal
Acid+Metal Carbonate

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4
Q

Acid+Base

A

Salt+Water (Neutralization)

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5
Q

Acid+Active Metal

A

Salt+Hydrogen Gas(

Pop test

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6
Q

Acid+Metal Carbonate

A

Salt+Water+Carbon Dioxide

turns Milky

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7
Q

Evidences of Chemical Rection

A
  • Bubbling(Gas Produced)
  • Temperature Change (products get hotter or colder)
  • Precipitate(solid forms)
  • colour change
  • Chemical Disappear or appear
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8
Q

Conservation of Mass

A

Mass is not created or destroyed during a reaction

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9
Q

conservation of mass notes

A

if mass is less than reactants then a gas has been given off

if mass of the product has been increased then a gas has been joined with the rectants

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10
Q

Burning

A
  • Needs fuel (combustibe material)
  • Oxygen
  • must heat the fuel to its combustion temperature before it will ignite
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11
Q

Carbon Dioxode is produced when

A

a material burns, lime water is used for test

turns milky when C02 bubbled through it

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12
Q

Corrosion

A

Rusting is the corrosion of iron

Water and Oxygen are needed to make a metal corrode (form a metaloxide)

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13
Q

Indicators

A

tell if a substance is an acid, base or neutral

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14
Q

More indicator notes

A

Indicators go a different colour in an acid, base or neutral

Common Indicators

  • Universal Indicator
  • Acid-red yellow
  • Bases-Pink or the litmus blue
  • Litmus Paper
  • Acid- Blue Litmus turns pink
  • Bases-Pink litmus turns blue
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15
Q

More Info about acids

A
  • contain the element hydrogen
  • have a sour taste
  • are corrosive liquids
  • effect the colour of indicators
  • are neutralized by bases
  • react with matals to form a salt and hydrogen gas
  • react with metal carbonates to form a salt. water and carbon dioxide gas
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16
Q

Common Acids

A

Sulfuric acid-(Hydrogen Sulfate)-H2SO4
Hydrochloric Acid-(Hydrogen Chloride-HCL
Nitric Acid- (Hydrogen Nitrate)-HNO3

17
Q

Neutralization

A

Acid+Base –}salt+water

(H+) + (OH-) –}H2O

18
Q

Neutralization (Check)

A

checked using a chemical indicator such as universal indicator which goes green in neutral liquids

19
Q

PH SCALE

A

PH scale can be used to determineby using Universal Indicator
>Certain Colour

20
Q

Salts

A

Formed by reaction of acid with base
acid+metal
acid+metal carbonate

Many are soluable in water (dissolve)
Examples
1)sodium chloride NaCL
2)Calcium Carbonate CaCo3

21
Q

Solubility

A

is a measure of how easily a substance dissolves in water

salt+water–} salt water solution
solute+solvent—}solution

22
Q

5 ways reduce corrosion

A

Oiling painting galvanizing grease sacrificial anodes