Acids and Bases

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by hameater2013
Last updated 4 years ago

Discipline:
Science
Subject:
Chemistry
Grade:
8

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Acids and Bases

Acids:pH: <7Taste SourTurn Blue Litmus Paper RedDissolve in water to form solutions which conduct electricity.Produces H+ ions.

Acids and Bases

Acidic: < 7Neutral: 7Alkaline: > 7

The pH scale is a set of numbers from 0 to 14 to indicate whether a solution is a acidic, neutral or alkaline.

The pH Scale

Having Fun With Chemistry!!

Uses of Acids and Alkaline in Daily Life

AlkalipH: >7Taste BitterTurn Red Litmus Paper BlueProduces OH- ions.

Neutral OxidesNeither Acidic nor Basic

Metal + Acid → Salt + HydrogenMg + H2SO4 → MgSO4 + H2

Carbonate + Acid → Salt + Water +Carbon DioxideCaCo3 + 2HCl → CaCl2 + H2O + CO2

Metal Oxide + Acid → Salt + WaterZnO + H2SO4 → ZnSO4 + H2O

Alkali + Ammonium Salt → Salt + Water + AmmoniaCa(OH)2 + 2NH4Cl → CaCl2 + 2H2O + 2NH3

Alkali + Salt → Salt + Metal Hydroxide2NaOH + FeSO4 → Na2SO4 + Fe(OH)2

Chemical Equations

Types of Oxides

Acidic OxidesReact with Alkali to form a salt and water

Amphoteric OxidesReact with both Acids and Alkali to form salts and water

Basic OxidesReact with Acids to form a salt and water

WeakAcids

StrongAcids

Only partially ionise in aqueous solution.

Example: Ethanoic Acid (CH3COOH)

Completely ionise in aqueous solution.

Example: Sulfuric Acid (SO4)

News Today

Alkaline Diet describes a group of loosely related diets based on the belief that certain foods can affect the acidity of body fluids, and therefore can be used to treat or prevent diseases.


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