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Bob Hawke > hydrogen ions and acids and bases science > Flashcards

hydrogen ions and acids and bases science Flashcards

1
Q

what is an acid

A

an acid is below a 7 on the ph scale and produce hydrogen ions
H+

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2
Q

what is a base

A

a base is above a 7 on the pH scale and accepts hydrogen ions
OH-

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3
Q

what is pH

A

a measure of the acidity of a solution, usually measured on a scale of 0 to 14

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4
Q

what is a salt

A

A salt consists of the positive ion (cation) of a base and the negative ion (anion) of an acid.

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5
Q

what is electrolysis

A

electric currants going through a liquid to cause chemical, change

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6
Q

what is a Fuel Cell

A

A fuel cell uses the chemical energy of hydrogen or other fuels to cleanly and efficiently produce electricity

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7
Q

what is Cation

A

a positively charged atom

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8
Q

what is Anion

A

a negatively charged atom

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9
Q

properties of hydrogen

A

1.coularless
2.tasteless
3.oderless
4.non-toxic
5.highley combustion

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10
Q

word equation for combustion of hydrogen

A

H2 + 1 2 O2 −→ H2O + 286, 000 joules

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11
Q

explain octet rule

A

the tendency of atoms to prefer to have eight electrons in the valence shell

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12
Q

explain green hydrogen production

A

it is obtained through electrolysis

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13
Q

risk of hydrogen as an energy supply

A

highlry comustable

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14
Q

benefits of hydrogen as a energy supply

A

-sustainable
-efficient
-lighter than traditional sustanibity methods

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15
Q

what is an alkali

A

a base that dissolves in water to form a solution with a pH greater then 7

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16
Q

what is neutralization reaction

A

a netuzation reaction happens when you combied an acid and a base resulting in a salt and water

17
Q

what is valance shell and where is it located

A

they are the outer layer of the atom and contribute to and electrical charge

18
Q

three ways hydrogen can be produced

A

-electrolysis
-fossil fuels
-biomass

19
Q

what is an indictor

A

substances that change colour when they are added to acidic or alkaline solutions

20
Q

what is an ion

A

an ion is a atom that has a charge

21
Q

what is proton

A

a positively charged ion

22
Q

what is neutron

A

a netruley charged ion

23
Q

what is an electron

A

a negatively charged ion

24
Q

equation for the reaction within a hydrogen fuel cell

A

2h2

25
Q

List the properties of acids

A
26
Q

List examples of anions

A

-Oxide
-fluoride
-chloride

27
Q

Explain what makes an ion positively or negatively charged

A

An ion is a particle like an atom that has lost or gained electrons giving it a charge being either positive or negtive

28
Q

List the properties of bases

A

-bitter
-soupy to touch
-can conduct

29
Q

the purpose of pH indicators

A

to tell weather substances is acidic or alkali an how much if so

30
Q

Recall the general equation for the reaction of a metal and an acid

A

acid + metal → salt + hydrogen.

31
Q

Recall the general equation for the reaction of a carbonate and an acid

A

Acid + Metal Carbonate → Metal Salt + Carbon Dioxide + Water

32
Q

Recall the general equation for neutralisation reactions

A

acid + base = salt + water.

33
Q

Describe the process of electrolysis of water

A

split water into oxygen and hydrogen with the help of electricity

34
Q

Write the word equation for the electrolysis of water

A

H20 > H2 + 02

35
Q

Describe the advantages and disadvantages of green hydrogen production

A

easier
better for the envermnet \
requieses enerfy

36
Q

List examples of cations

A

-sodium
-calcium
-magnesium

37
Q

different types of pH indicators

A

-universal indicator
-ph probe
-litmus

38
Q

Define pH

A

A measure of how acidic or basic a substance or solution is

Bob Hawke (27 decks)

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