Emulsifiers are molecules with a water-loving (hydrophilic) part and an oil loving (hydrophobic) part. The hydrophilic end bonds to water molecules and the hydrophobic end bonds to oil molecules, keeping the oil and water from separating.
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Why do perfumes meed to evaporate?
Perfumes need to evaporate so that they can easily reach the nose. To evaporate, particles need sufficient kinetic energy to overcome their attraction to other molecules in the liquid.
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What happens when eggs and meat are cooked?
Protein molecules in eggs and meat denature when they are cooked. The change of shape of the protein molecule is permanent.
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Why are paints colloids?
Paints are colloids because the particles are mixed and dispersed throughout a liquid but are not dissolved in it.
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What are Thermochromic Pigments?
Thermochromic pigments change colour with heat and are used, for example, in babies' toys that are immersed in water is too hot.
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What are Phosphorescent Pigments?
Phosphorescent pigments glow in the dark and are much safer for use in products than the alternative radioactive substances.
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Other cards in this set
Card 2
Front
Why do perfumes meed to evaporate?
Back
Perfumes need to evaporate so that they can easily reach the nose. To evaporate, particles need sufficient kinetic energy to overcome their attraction to other molecules in the liquid.
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