Fichas
CHEMISTRY EXAM 2013
Fichas del conjunto (35)
- 1pH Scale/Universal Indicator- exact pH (0-14)
- power of hydrogen
acid-red neutral-green base-purple - 2OxidationLoss of electrons
- 3Formel hydrochloric acidHCl
- 4Test for carbon dioxidebubble into limewater
-> milky white - 5Effects of acid rain1. speeds chemical weathering
2. soil acidic
3.lakes acidic
4.waxy coating on leaves - 6Naming salts1st part: metal
2nd part: acid - 7red litmusacidic red
neutral red
alkaline blue - 8blue litmusacidic red
neutral blue
alkaline blue - 9what is acid rain?lower ph than normal(5.6)
sulfure dioxide(power plants)
nitrogen oxide(cars)
-> in water: acids - 10Half reaction at cathodeCu2+ + 2e- -> Cu^0
- 11chemical weatheringacids in rainwater attack the rock
- 12Formel carbonic acidH2CO3
- 13Formel sulphuric acidH2SO4
- 14Test for hydrogenlight wooden stick
-> pop - 15formel nitric acidHN03
- 16hydrochloric acid ->chloride
- 17sulohuric acid ->sulphate
- 18nitric acid ->nitrate
- 19litmus in generalacidic red
neutral purple
alkaline blue - 20strong acids/basesstrong electrolytes - completely dissociated
weak electrolytes - incompletely dissociated - 21Arrhenius theoryacids: pro. hydrogen ions H+ (aq)
alkali: prod. hydroxide ions OH- (aq) - 22Arrhenius Theory formalH+(aq) + OH-(aq) -> H20(l)
- 23formel phosphoric acidH3PO4
- 24Difference bases/alkalibases - no dissolving in water
alkali - dissolve in water - 25ReductionGain of electrons
- 26Reducing agentdonates electrons
- 27oxidising agenttakes electrons
- 28Aufbau daniell cellgalvanic vell
2 half calls
connected by salt bridge
voltmeter reading cell potential - 29Half-reaction at anodeZn^0 -Y Zn2+ + 2e-
- 30Acid dissociation formalHX(aq) -> H+(aq) + X-(aq)
- 31Use of salt bridgeconnects 2 half cells
allows flow of ions - competing circuit -> maintains neutrality - 32what happens in the daniell cell?1. anode - smaller
2. cathode - larger
3. colour cathode solution fades
4.voltmeter registers reading - 33alkali dissociation formelMOH(aq) -> M+(aq) + OH-(aq)
- 34Reducing acid rainsulfur dixide: remove gases
nitrogen oxide: catalytic converter in cars - 35Test for oxygenglowing wooden stick
relights
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- European School, Ms Humphries, S5
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- Juliet
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