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Chemistry > Unit 3- The pH Scale > Flashcards

Unit 3- The pH Scale Flashcards

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0
Q

What pH are acids?

A

Less than 7

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1
Q

What is the pH scale?

A

A measure of pH ranging from below 0 to above 14

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2
Q

What pH is alkali?

A

More than 7

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3
Q

What pH is neutral solutions?

A

Equal to 7

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4
Q

Non metal oxides dissolve in water to give what type of solution?

A

Acid solution

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5
Q

Metal oxides and hydroxides dissolve in water to give what type of solution?

A

Alkaline solution

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6
Q

What do metals produce when they burn in air?

A

Metal oxides

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7
Q

What is another name for metal oxides?

A

Basic oxides

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8
Q

What is produced when a metal oxide is dissolved in water?

A

Metal hydroxide

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9
Q

What type of solutions are metal hydroxides?

A

Alkali

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10
Q

What type of solution is it when ammonia dissolves in water?

A

Alkali

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11
Q

Is ammonia gas insoluble or soluble?

A

Very soluble in water

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12
Q

What does ammonia gas dissolve in water to form?

A

Alkali ammonium hydroxide

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13
Q

What do non metals burn to produce?

A

Non metal oxides

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14
Q

What type of solution is a non metal oxide?

A

Acidic

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15
Q

When non metal oxides dissolve in water what type of solution is formed?

A

An acidic solution

16
Q

What is the formula for hydrochloric acid?

A

HCl

17
Q

What is the formula for nitric acid?

A

HNO3

18
Q

What is the formula for sulphuric acid?

A

H2SO4

19
Q

What is the formula for sodium hydroxide?

A

NaOH

20
Q

What is the formula for potassium hydroxide?

A

KOH

21
Q

What is the formula for calcium hydroxide?

A

Ca(OH)2

22
Q

What is the formula for ammonium hydroxide?

A

NH4OH

23
Q

What is the concentration of hydrogen ions and hydroxide ions in a water or aqueous solution?

A

Equal

24
Q

Why type of solution contains more hydrogen ions than hydroxide?

A

Acidic solution

25
Q

What type of solution contains more hydroxide ions than hydrogen ions?

A

An alkaline solution

26
Q

What happens to the pH of an acidic solution when it is diluted?

A

The pH moves towards 7 as the concentration if hydrogen ions decreases

27
Q

What happens the pH of an alkaline solution when it is diluted?

A

The pH moves down towards 7 as the concentration of hydroxide ions in the solution decreases

28
Q

What happens when a reversible reaction is in equilibrium?

A

The concentrations of the reactants and the products remain constant although not necessarily equal

Chemistry (44 decks)

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