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science > Chemical Charges > Flashcards

Chemical Charges Flashcards

1
Q

Hydroxide

A

OH-

Anything with OH is usually alkaline!

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2
Q

Carbonate

A

CO3 2-

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3
Q

Nitrate

A

NO3 -

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4
Q

Sulfate

A

SO4 2-

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5
Q

Ammonium

A

NH4 +

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6
Q

Hydrogen ion

A

H +

anything with H+ is usually acid!

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7
Q

Copper (II) ion

A

Cu 2+

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8
Q

Iron (II) ion

A

Fe 2+

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9
Q

Iron (III) ion

A

Fe 3+

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10
Q

ionic charge for group 1, 2, 13, 14, 15, 16, 17 and 18?

A

1 - 1+
2 - 2+
13 - 3+
14 - 4+
15 - 3-
16 - 2-
17 - 1-
18 - 0 (noble gas)

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11
Q

Hydrochloric Acid

A

HCl (0 charge)

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12
Q

Sodium Hydroxide

A

NaOH (0 charge)

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13
Q

Potassium Hydroxide

A

KOH (0 charge)

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14
Q

Calcium Hydroxide

A

Ca(OH)2
aka limewater

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15
Q

Sulfuric Acid

A

H2SO4 (0 charge)

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16
Q

Nitric Acid

A

HNO3

17
Q

Acid-metal reaction?

A

acid + reactive metal → hydrogen gas (H2) + salt (remnants)

18
Q

Acid-carbonate reaction?

A

acid + carbonate → carbon dioxide (CO2) + water (H2O) + salt (remnants)

  • when effervescence is observed / carbon dioxide is present, then it is an acid-carbonate reaction!
    carbonate = CO3 + smth
19
Q

Acid-Alkali Reaction

A

Acid + Alkali → Water (H2O) + salt (remnants)

  • this is called neutralisation
  • no gas is produced!
20
Q

Test for CO2

A

Bubble gas into limewater, a white precipitate will form if CO2 is present

  • for solid: odourless and colourless gas evolved
  • for liquid: effervescence of colourless and odourless gas observed
  • If CO2 is present, the reaction is an acid-carbonate reaction! (CO3 is one of the reactants)
21
Q

Test for Hydrogen Gas (H2)

A

Hold lighted splint near edge of tube, the splint will extinguish with a ‘pop’ sound if hydrogen gas is present

  • If H2 is present, the reaction is a acid-metal reaction!
22
Q

Zinc ion charge?

A

Zn 2+

23
Q

Copper ion charge?

A

Copper (II) -> Cu 2+

24
Q

Iron ion charge?

A

Iron (II) -> Fe 2+
Iron (III) -> Fe 3+

25
Q

(Hydrogen) Peroxide

A

O2 2-
Hydrogen Peroxide = H2O2

26
Q

Phosphate

A

PO4 3-

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