Acids, Bases And Salts Flashcards

1
Q

What is a base?

A

Any substance with a PH greater than 7

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2
Q

What is an acid?

A

Any substance that forms an aqueous solution with a PH below 7

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3
Q

What is an alkaline?

A

A base that dissolves in water forming a substance with a PH greater than 7

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4
Q

What ions do alkaline form in water?

A

OH-

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5
Q

What ions do acids form?

A

H+

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6
Q

What is the reaction between an acid and a base called? And what does it create?

A

Neutralisation reaction
Creates salt and water

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7
Q

What is the chemical formulae for sodium hydroxide? And is it an acid or a base?

A

NaOH
Base

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8
Q

What is the chemical formula for calcium carbonate? And is it an acid or a base?

A

CaCO3
Base

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9
Q

What type of metals can also be used in neutralising reactions?

A

Metal oxides, metal hydroxides, metal carbonate

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10
Q

What is produced when reacting acid and metal carbonate?

A

Salt, water and carbon dioxide

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11
Q

How do you make soluble salts using metals?

A
  • gently heat dilute acid
  • keep adding insoluble base (little bit at a time)
  • eventually base will stop dissolving (in excess meaning the rest of the solution is neutralised)
  • filter out excess (what is left is a dissolved form of soluble salt
  • to make into salt crystals heat in a water bath until crystals form
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12
Q

What is an example of an insoluble base?

A

Metal oxides, metal hydroxides, metal carbonate

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