425703
| Questão | Responda |
| pH Scale/Universal Indicator | - exact pH (0-14) - power of hydrogen acid-red neutral-green base-purple |
| Oxidation | Loss of electrons |
| Formel hydrochloric acid | HCl |
| Test for carbon dioxide | bubble into limewater -> milky white |
| Effects of acid rain | 1. speeds chemical weathering 2. soil acidic 3.lakes acidic 4.waxy coating on leaves |
| Naming salts | 1st part: metal 2nd part: acid |
| red litmus | acidic red neutral red alkaline blue |
| blue litmus | acidic red neutral blue alkaline blue |
| what is acid rain? | lower ph than normal(5.6) sulfure dioxide(power plants) nitrogen oxide(cars) -> in water: acids |
| Half reaction at cathode | Cu2+ + 2e- -> Cu^0 |
| chemical weathering | acids in rainwater attack the rock |
| Formel carbonic acid | H2CO3 |
| Formel sulphuric acid | H2SO4 |
| Test for hydrogen | light wooden stick -> pop |
| formel nitric acid | HN03 |
| hydrochloric acid -> | chloride |
| sulohuric acid -> | sulphate |
| nitric acid -> | nitrate |
| litmus in general | acidic red neutral purple alkaline blue |
| strong acids/bases | strong electrolytes - completely dissociated weak electrolytes - incompletely dissociated |
| Arrhenius theory | acids: pro. hydrogen ions H+ (aq) alkali: prod. hydroxide ions OH- (aq) |
| Arrhenius Theory formal | H+(aq) + OH-(aq) -> H20(l) |
| formel phosphoric acid | H3PO4 |
| Difference bases/alkali | bases - no dissolving in water alkali - dissolve in water |
| Reduction | Gain of electrons |
| Reducing agent | donates electrons |
| oxidising agent | takes electrons |
| Aufbau daniell cell | galvanic vell 2 half calls connected by salt bridge voltmeter reading cell potential |
| Half-reaction at anode | Zn^0 -Y Zn2+ + 2e- |
| Acid dissociation formal | HX(aq) -> H+(aq) + X-(aq) |
| Use of salt bridge | connects 2 half cells allows flow of ions - competing circuit -> maintains neutrality |
| what happens in the daniell cell? | 1. anode - smaller 2. cathode - larger 3. colour cathode solution fades 4.voltmeter registers reading |
| alkali dissociation formel | MOH(aq) -> M+(aq) + OH-(aq) |
| Reducing acid rain | sulfur dixide: remove gases nitrogen oxide: catalytic converter in cars |
| Test for oxygen | glowing wooden stick relights |
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