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Pool > Chemistry > Flashcards

Chemistry Flashcards

1
Q

Do saltwater pools use chlorine

A

Yes, by passing water through a salt chlorine generator

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2
Q

What happens when the salt chlorine generator adds electricity to the water and salt

A

The chemicals change into hydrogen gas and hypochlorous acid

  • The acid sanitizes the pool
  • The gas bubbles out of the water and into the air
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3
Q

What happens if a pool does not circulate properly

A

Saltwater concentration could go up in specific areas

-Water needs to circulate through filters

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4
Q

How much salt is recommended (generally)

A

3000 to 3400 ppm

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5
Q

What is cyanuric acid

A

Cyanuric acid is a chemical stabilizer and attaches itself to chlorine molecules

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6
Q

What are other names for cyanuric acid

A

CYA

Chlorine stabilizer

Conditioner

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7
Q

Why do you want to use cyanuric acid

A

Prevents the breakdown of free chlorine from the sun

Allows chlorine to stay optimized

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8
Q

Why do you want to keep your chlorine stabilized

A

Chlorine kills bacteria and algae

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9
Q

What are the 3 different types of chlorine

A

Free chlorine - chlorine that is ready to sanitize

Combined chlorine - used chlorine that has already killed bacteria or algae

Total chlorine - All the chlorine in the pool (free + combined)

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10
Q

What is the downside of cyanuric acid

A

It lowers the effectiveness of you chlorine

-Also known as ORP (oxidation reduction potential)

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11
Q

What are the recommended levels of cyanuric acid

A

40 - 100 ppm

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12
Q

What are some general percautions for adding cyanuric acid into the pool

A

Wear acid resistant gloves

Eye protection

Mix with water and pour into the skimmer (read directions)

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13
Q

What would you do if your cyanuric acid to really low

A

Add lots of chlorine

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14
Q

What is muratic acid

A

Muratic acid is a form of hydrochloric acid but with more dilution

It cleans and removes one substance from another

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15
Q

What is alkalinity

A

A measure of the ability of water to neutralize acids

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16
Q

What are the recommended levels for alkalinity in a pool

A

80 - 120 ppm

17
Q

What is pH

A

A figure expressing the acidity or alkalinity of a solution

18
Q

What happens if your pH is to high (high alkalinity)

A

Can create:

Calcium

Clogged filters

Cloudy water

Pool damage

Scaling

Skin irritation and itchy eyes

The chlorine in the water can no longer do its job effectively = bacteria and algae

19
Q

What happens if your pH is to low

A

The water can turn acidic

Harmful to pool and equipment

Green water

Burning eyes and itchy skin

20
Q

Why does alkalinity rise and fall

A

The alkalinity can rise with (pH level increase) with:

Body lotions

Sweet

New water

The alkalinity can lower with (pH level decrease) with:

Rain (chemical dillution or slightly acidic rain)

21
Q

What is the pH level of acid

A

A pH of 7 or less

22
Q

Why do we use muratic acid

A

To lower the pH of a pool

23
Q

Do you need to dillute muratic acid before adding into the pool

A

Yes

Use a 10:1 mixture of water and acid

Always add water first to prevent a chemical reaction

24
Q

What is the ultimate goal in pool chemistry

A

A perfect pH

25
Q

How can you raise the pH (alkalinity) of a pool

A

By adding:

Alkaline salts

or

Baking soda

or

Other alkalinity-increasing products

26
Q

What is the perfect pH level

What is the pH level range

A

7.3

7.2 - 8

27
Q

What is the difference between cyanuric acid and muratic acid

A

Cyanuric acid helps prevent chlorine from being degraded by the sun

Muratic acid is used to adjust your pH

28
Q

What are the advantages of salt chlorination

A

Saves money on chlorine

Gentler on skin, hair, and eyes

Saltwater feels soft and silky

Easier to maintain

No chlorine smells

Pool (1 decks)

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