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Flashcards in Acids And Bases Deck (28):
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Common laboratory acid (strong)

Hydrochloric acid HCL

1

Common laboratory acid (weak)

Citric acid

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Properties of acids

- corrosive concentrated
- will "attack" metals, skin and fabric
- sour taste
- contain hydrogen ions H+

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What does H+ mean?

The amount of this determines the strength "attack" level

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Common laboratory base (strong)

Calcium hydroxide CaOH2

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Common laboratory base (weak)

Soaps

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Properties of bases

- feel soapy
- when concentrated they burn flesh
- contain OH ion

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Strong and weak acids:

- when the acid is strong that means that's each acid molecule will react strongly

- lab acids are all strong

- weak acids, even if a big amount or concentrated will not have a harmful effect

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Concentration means:

Concentration means how many molecules are mixed with water

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Dilute means:

Solutions have a lot of acid/base molecules and only a few acid molecules

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Concentrated means:

Solutions have a lot of acid/base molecules and only a few water molecules

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PH scale:

Determines if the solution is acidic or basic, If the solution is greater than 7 it is basic. If it's less it's acidic

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Universal indicator:

- Shows colour changes for each step on the PH scale
- goes between strong acid to strong base
- math linked to the concentrated to H+ ions

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Neutralisation:

When an acid and base react together they make water and salt

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Neutral word equation :

Acid+base > water+salt

ACID
HCI+NaOH > H2O NaCI

(Hydrochloric, nitric, sulphuric)

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Neutralisation word equation:

Acid+base > water+salt
BASE
"Metal"
- chloride
- nitrate
- sulphate

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Metals and acids: + word equation

- when acid and metal react, hydrogen gas and "salt" is made.

Acid+metal > hydrogen gas+salt

2HCI+Mg > H2+MgCI2

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More reactions of metals and acids

Iron and sulphuric acid > hydrogen gas+ iron sulphate

Calcium and nitric acid > hydrogen gas+calcium nitrate

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Acids and carbonates word equation

Acid+carbonate > carbon dioxide+water+salt

2HCI+Na2CO3 > CO2+H2O+NaCI

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Acids and carbonates example

2HCL + Na2 CO3 = CO2 + H2O + NaCl

Hydro.Acid+Nitric acid = carbon diox.+ sulphuric acid

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Acid and base word equation example

HCL + NaOH = H2O + NaCL
Hydro.acid+Nit.acid = Water+sulphuric acid

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Acid and metal word equation. Example

2HCL + Mg = H2 + MgCL2
Hydro.acid+Magnesium = Hydro.gas+magnesium chloride

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Ion is?

Electrically charged atom or group of atoms

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Compound?

Composed if one or more atoms

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+ Concentrated means? +

+Treated to reduce inessential ingredients +

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Ph ???

A blue colouring matter that reacts with both acid and base

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Define concentration:

Solutions have only a few water molecules with a lot of acids/base molecules

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Define dilute:

Solutions have a lot of water molecules and a few acid/base molecules