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ACIDS AND BASES SNC 2D1. What is an acid?

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Presentation on theme: "ACIDS AND BASES SNC 2D1. What is an acid?"— Presentation transcript:

1 ACIDS AND BASES SNC 2D1

2 What is an acid? http://www.youtube.com/watch?v=kcDSngXldB0

3 household acids Vinegar (Acetic Acid) Sour fruits like Lemon (Citric Acid) Vitamin C (Ascorbic Acid)

4 Properties of acids Commonly contain H + Water-soluble (this may make them more dangerous) Sour-Tasting Corrosive Conduct electricity

5 Reactive Properties of acids

6 household bases Antacid (Aluminum Hydroxide) Baking Soda (Sodium Bicarbonate) Drain Cleaner (Sodium Hydroxide)

7 Properties of bases Commonly contain OH - Water-soluble (this may make them more dangerous) Bitter-Tasting Corrosive Conductive React with Protein (eg. those in your skin and eyes) *Another word for BASIC is ALKALINE

8 Why you should wear goggles http://www.youtube.com/watch?v=DedE68fjKRM

9 Electrical conductivity

10 Naming acids and bases When the chemical formula of an acid starts with H and has only one other non-metallic element, it is named by adding the prefix "hydro" and the suffix "ic" and the word "acid". HClHYDROCHLORIC ACID HFHYDROFLUORIC ACID

11 Naming acids and bases Acids that contain a polyatomic ion and an oxygen atom (oxyacids) can be named as follows: a) If the polyatomic ion ends in "ate" add the suffix "ic" and the word acid. b) If the polyatomic ion ends in "ite" add the suffix "ous" and the word acid.

12 Naming acids and bases SO 4 2- is Sulfate, so H 2 SO 4 SULPHURIC ACID SO 3 2- is Sulfite, H 2 SO 3 SULPHUROUS ACID

13 Naming acids and bases The name of a base can be determined from the name of the positively charged metallic ion or polyatomic ion at the beginning and then adding the word "hydroxide". NaOH SODIUM HYDROXIDE NH 4 OH AMMONIUM HYDROXIDE

14 Naming acids and bases Some bases are more difficult to recognize. Substances that contain BICARBONATE or HYDROGEN CARBONATE, HCO 3 - are bases because they react with water to form hydroxide ions Ex: NaHCO 3 SODIUM BICARBONATE

15 Homework -Textbook pg. 271 #1-7 -Acids and Bases Summary Table


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