16 terms

Chemical Reactions

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How a chemical reacts with other chemicals
Chemical characteristics
Groups of substances that form hydrogen (H⁺) ions in solution
Acids
Sour taste
Turns litmus red
Conduct electricity
Properties of acids
Group of substances that form hydroxide (OH⁻) ions in solution
Bases/Alkalis
Bitter taste
Feel slippery/soapy
Turn litmus blue
Conduct electricity
Properties of bases
A scale between 0 - 14 used to indicate how acidic or basic a substance is
pH scale
Chemical substances that change colour when an acid or base is added to it e.g. litmus, bromothymol blue, methyl orange, phenolphthalein
Indicator
An solution made of a combination of 4 different indicators covering a wide pH range
Universal indicator
Acid + Base → Salt + Water
Neutralisation reaction
A reaction that releases heat energy
Exothermic reaction
A reaction that absorbs heat energy
Endothermic reaction
A chemical reaction where a fuel reacts with oxygen, producing heat
Combustion
13. A chemical compound that only contains carbon and hydrogen.
Hydrocarbon
Glucose + Oxygen → Carbon Dioxide + Water + Energy
Respiration
Carbon dioxide + Water + Energy → Glucose + Oxygen
Photosynthesis
16. The ability of a substance to hold heat.
Specific Heat Capacity
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