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When an acid and base are mixed together they can neutralize each other.

This means they cancel or neutralize the properties of each other

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When an Acid and Base neutralize... they form salt water.

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Bases dissolved in water are called Alkalis

Anything that turns RED Litmus paper BLUE

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Where can bases be found on the Periodic Table?

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Where can bases be found on the Periodic Table?

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The metals in group 1 are called Alkali Metals because when they dissolve in water they form an alkaline solution.

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Sodium Hydroxide

Can be found in a common science lab

Chemical Formula: NaOH (Sodium is Na and Hydroxide is OH)

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Acid means sour.

Anything that turns BLUE Litmus Paper RED.

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Litmus Paper is an indicator. It tells us if something is acidic or basic (ACID or BASE)

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Example:

Vinegar, Lemons, and your Stomach are all naturally acidic.

Oranges, Milk, and Soda (Coke) are acids.

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Some acids are VERY dangerous.

Example: Car Batteries

It is called sulphuric acid and is corrosive.

What is corrosive mean?

This means that it damages or attacks materials like metals.

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The acid found in our stomachs is as strong as car battery acid.

The stomach has a lining which protect it from being corroded.

Hydrochloric acid is the acid found in our stomachs

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Hydrochloric acid

Sulphuric Acid

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The pH scale tells us if something is an acid or a base. It also tells us how strong or weak and acid or base is.

If something has a pH less than 7, it is ACIDIC

The lower the number, the stronger the acid.

EXAMPLE: Stomach Acid has a pH of 1

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Example:

Soap

Baking Soda

Toothpaste

Oven Cleaner

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Toothpaste

is a base and is used to neutralize the acid produced by bacteria in your mouth which can cause tooth decay.

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Often used for:

Drain Cleaner

Oven Cleaner

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Bee Stings are ACIDIC but can be neutralized with a BASE, baking soda

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Antacids are mild alkalis (bases) that are used to neutralize the excess acid that causes heartburn

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If something as a PH of more than 7, it is ALKALINE. The higher the number the more ALKALINE (basic) it is.

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Add 5 drops of Dilute HCL to the Petri dish.

Add dilute NaOH drop by drop until the Ph is neutral 7

Let the water evaporate and you will see salt crystals in the Petri dish