Acids, Bases & Salts

What do you know about…

Acids

Bases or alkalis

salts

Chemical Makeup

Acids, bases and salts are all ionic compoundsAcids contain hydrogen ions (H+)

Ex. HCl, H2SO4

Base contain hydroxide ions (OH-)Ex. NaOHSalts contain other positive and negative ions Ex. MgO, NaCl

Classify these….

Ca(OH)2

H3PO4

FeO

MgSO4

NH4OH

HBr

Aqueous solutions

Acids, bases and salts all release ions when dissolved in water

Acids release H+ ions

Bases relese OH- ions

Salts release other + and - ions

Properties

Which ones conduct electricity?(acids, bases and salts)

Which one reacts with metals to form H2 gas?(acids)

Which one turns red litmus paper blue?(base)

Which one turns blue litmus paper red?(acid)

Water

Is water an acid or a base?

Neither - Why?

water is neutral because it contains equal numbers of H+ ions and OH- ions

(H2O = HOH)

The pH Scale

Measures how acidic or basic something isScale goes from 0 to 14Each number is 10X as acidic or basic as the next numberLess than 7 = acidGreater than 7 = base7 = neutral

Practice: page 209 (8.1) # 4,6,8,11