Chemistry Topic 8, Acids and Alkalis
- Created by: Meggie
- Created on: 29-10-12 16:43
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- Chemistry Topic 8 Acids and Alkalis
- in neutral solutions the concentration of H=OH.
- hydrogen pops with a lit splint
- water contains few ions so has a low electrical conductivity.
- Effects: errodes limestone buildings, corrodes unprotected metal structures, kills fish and plants in lakes and kills trees.
- Sulphur Dioxide reacts with water to produce acid rain. (sulphurus acid)
- pure water and neutral solutions have a pH of 7
- Alkalis
- group 1+2 metal oxides and hydroxides which dissolve in water form alkalis.
- alkalis pH more than 7
- Common lab alkalis: LiOH, NaOH, KOH, Ba(OH)2 and NH4OH
- contains ions so has high electrical conductivity
- Alkalis contain OH-
- contains more OH- than pure water
- Acids
- non metal oxides which dissolve in water form acids
- acid ph less than 7
- Common lab acids: HCL AND HNO3 AND H2SO4
- contains ions so has high electrical conductivity
- acids contain H+
- contains more H+ than pure water
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