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28 Cards in this Set
- Front
- Back
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Acids have a _____ pH
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Low
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Acids can be Neutralised by....
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Alkali's
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Alkali's can be ...
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Neutralised by Acids
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Alkali's have a pH....
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of 8 or above. (e.g. 11)
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Examples of weak houshold acids include..
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Lemon Juice, Vineger and Orange Juice.
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All acids have a ...
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sour taste. (But some are Very Dangerous so don't try this.)
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Strong acids disolve things, we say they are ....
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Corrosive
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Examples of strong acids include...
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Stomach acid (HCl), Battery Acid (H<sub>2</sub>SO<sub>4</sub>) and Nitric Acid (HNO<sub>3</sub>)
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Weak household Alkali's include..
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...soap and washing up liquid
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If touched, Alkali's produce a .....
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soapy feel to the fingers. (By converting some of the fats in/on your skin to soap.)
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Strong Alkali's can be as c....
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corrosive as strong acids.
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Neutral substances are ....
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neither Acid or Alkali. (Can still be very harmful.)
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Pure Water is an example of a Neutral substance. It has a pH of ....
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7
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pH less than 7
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Acidic.
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Alkaline
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pH more than 7.
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Neutralisation
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Cancelling out of an acid or alkali.
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pH Scale
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Measures acidity or alkalinity.
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Neutral
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pH 7.
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Corrosive
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A substance that 'Attacks' or 'Destroys' living materials, some rocks and metals.
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Irritant
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Can cause redness or blistering of skin
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Toxic
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Poisonous
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Harmful
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Health risk if breathed in, taken internally or absorbed through skin.
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Hazcard
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Contains information on the risks associated with certain chemicals.
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Hazard Symbols
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Give immidiate warning of hazardous substances.
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Indicators
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Substances that change colour in response to acid or alkalis.
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UI (Universal Indicator)
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A mixture of indicators that give a colour changes over the range pH1-pH14
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Litmus
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An indicator made from Lichen
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Antacid
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A substance that can be used to neutralise an acid. e.g. An acid indigestion tablet.
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