chapter 4 acids and redox Flashcards

1
Q

what is an acid?

A

released H+ ions in aqueous solution

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2
Q

What is a base?

A

compound that neutralises an acid to form a salt

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3
Q

what is an alkali?

A

type of base that dissolves in water to release OH- ions

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4
Q

What are metal oxides, metal hydroxides, metal carbonates and ammonia classified as?

A

a base

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5
Q

what can titrations be used for?

A

finding the concentration of a solution, identification of unknown chemicals, finding the purity of a substance.

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6
Q

what is a standard solution?

A

solution of known concentration

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7
Q

what equipment is used for an acid base titration?

A

burette and pipette

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8
Q

what are the special cases for oxidation numbers?

A

H in metal hydrides is -1 (e.g. NaH), O in peroxides is -1 (e.g. H2O2), O bonded to F is +2(e.g. F2O)

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9
Q

What are the definitions of oxidation and reduction?

A

oxidation: loss of electrons/addition of oxygen/increase in oxidation number.
reduction: gain of electrons/removal of oxygen/decrease in oxidation number.

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