Acid Reactions
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| Opposite of acid | Alkali
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| PH Scale | a measure of how acidic/alkali a substance is.
Range goes from 0 - 14 - 7 being neutral. less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base or alkaline.
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| Neutral | Water and blood
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| UI | Universal indicator
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| alkali | opposite of acid - has a pH graeter that 7
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| acid | opposite of alkali - has a lower pH than 7.
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| what is an example of an acid | examples: lemon juice, coca cola, vinegar, saliva, tea
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| what is an example of an alkali | examples: baking soda, drain cleaner, toothpaste
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| what is the regular pH of blood | 7.4 if it was higher than 7.6 or lower than 7.2 you would be very ill
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| what is ethanoic acid, and when is it useful or dangerous? | ethanoic acid is a very dangerous corrosive, it could give you terrible burns, it is safe when is it diluted, when it is known as vinegar
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| what must the pH of the soil be for carrots, cranberries, and sweetcorn? | carrots: 6 pH
cranberries: 5 pH
sweetcorn: 7.5 pH
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| Neutralisation | The chemical reaction that happens if you mix together an acid and a base
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| Indicator | a substance that changes colour when it is added to acidic or alkaline solutions
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| Bases | Alkali is a base. It is a base that dissolves in water. Not all bases are alkali but all alkali is base.
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| Bee stings | Bee stings are acidic. They can be neutralised using baking powder, which contains sodium hydrogen carbonate.
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| Table salt | Common table salt is sodium chloride
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| Chemical reaction | In a chemical reaction the atoms rearrange themselves and then join back together in a different way.
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| Can a chemical reaction be reversed? | It is very difficult to reverse a chemical reaction and get back the starting substances.
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| Useful chemical reactions | we can burn methane to help cook food and we can burn petrol to power vehicles.
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| Unhelpful chemical reactions | those that make food stale, or iron rusty.
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| Acid rain | Fossil fuels contain sulfur compounds. These produce sulfur dioxide, a gas with a sharp, choking smell, when burned. When sulfur dioxide dissolves in water droplets in clouds, it makes the rain more acidic than normal. This is called acid rain.
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| Test for hydrogen | burning splint held at the open end of a test tube of gas. If the gas is hydrogen it burns with a loud “squeaky pop” ( the result of the rapid combustion of hydrogen with oxygen to produce water.)
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| What can you add to zinc to make zinc sulphate | Zinc sulfate is produced by treating virtually any zinc-containing material (metal, minerals, oxides) with sulfuric acid.
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| Word equation (chemistry) | A word equation represents a chemical reaction using the names of the substances involved. Word equations do not show any chemical symbols or formulae. Use + and > rather than =
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| What salt would be made if zinc reacts with nitric acid? | Zinc nitrate
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| Improve a PH sensors results | Conduct Lab Calibration Services daily
Make Sure the Sensor Is Always Hydrated.
Prepare the New Electrode
Make Sure that the Probe is Clean.
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Created by:
Frankiek
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