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Question
Water potential of pure water at standard temperature is equal to
Water potential of pure water at standard temperature is equal to
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Solution
The correct option is C Zero
Definition:
Water potential is the measure of concentration and free energy of water in a system per unit volume. It is expressed in pressure units such as Pascals (Pa).
High water potential:
A high water potential means the concentration of water and the kinetic energy of water molecules in that system is high.
Water potential of solution:
When a solute is added to the system, some water molecules get bound to the solute particles. Thus the kinetic energy of the water molecules reduces and the concentration of free water molecules is also less. The water potential is lowered.
Water potential of pure water:
In pure water there are no dissolved solutes. Therefore the water potential is the highest for pure water and the value is 0 pascals at standard temperature and pressure.
Final answer c. Zero.
Definition:
Water potential is the measure of concentration and free energy of water in a system per unit volume. It is expressed in pressure units such as Pascals (Pa).
High water potential:
A high water potential means the concentration of water and the kinetic energy of water molecules in that system is high.
Water potential of solution:
When a solute is added to the system, some water molecules get bound to the solute particles. Thus the kinetic energy of the water molecules reduces and the concentration of free water molecules is also less. The water potential is lowered.
Water potential of pure water:
In pure water there are no dissolved solutes. Therefore the water potential is the highest for pure water and the value is 0 pascals at standard temperature and pressure.
Final answer c. Zero.
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