Water as a Solvent 0.0 / 5 ? BiologyBiological moleculesASEdexcel Created by: TxxWxrd1Created on: 28-12-20 21:55 Polar Nature Water is a POLAR molecule Its chemical charge is UNEVEN - The molecule is a V shape - Two hydrogens are slightly positive - One oxygen is slightly negative Means the molecules form HYDROGEN BONDS 1 of 4 Solvency Water molecules are attracted to each other due to their POLARITY This also mean other substances can be attracted to water This makes water a solvent for POLAR MOLECULES and IONS This is important in the transport of substances around the body - Most exchange surfaces are lined with mucus - Blood is mostly plasma 2 of 4 Crystalline Structure When hydrogen bonds freeze they form solid crystalline structures Forcing water molecules apart making ice LESS DENSE than water This is important becuase it means large ice masses can form on earth 3 of 4 High Heat Capacity The Specific Heat Capacity of water is: 4200J/kg°C This means a lot of energy is required to change the temperature Water heat/cools very slowly - Making it a stable environment for animals - Good for maintaining homeostasis 4 of 4
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