Types of solutions

Types of Solutions & the Direction of Water Movement: hypertonic – the fluid outside the cell has a higher concentration of particles (or less water molecules) than the inside of the cell therefore, water molecules leave the cell and the cell shrinks hypotonic – the fluid outside the cell has a lower concentration of particles (or more water molecules) than the inside of the cell therefore, water molecules enter the cell and the cell swells isotonic – the fluid inside and outside of the cell have the same concentration of particles and free water molecules

Types of Solutions hypotonic isotonic hypertonic Cell Swells 90% Water 90% Water 80% Water 10% Salt 10% Salt 20% Salt 20% Salt 10% Salt 10% Salt 80% Water 90% Water 90% Water Lower concentration of particles (or more water molecules) outside the cell. Equal concentration of particles (and water molecules) inside and outside the cell. Higher concentration of particles (or less water molecules) outside the cell. Cell Swells Cell Stays the Same Cell Shrinks

Effects of Hypotonic, Isotonic, and Hypertonic Solutions 50 % Salt 50% H2O 60% Sugar 40% H2O 40% Oxygen 60% H2O 10 % Salt 90% H2O 30% Sugar 70% H2O 40% Oxygen 60% H2O or Swells or Shrinks

Turgid – swollen; the cell wall keeps the cell from bursting 40% Solute 30% Solute 70% Solute 40% Solute 60% Solute 30% Solute Shrinks 20% Solute 30% Solute 50% Solute 10% Solute 40% Solute 30% Solute Turgid – swollen; the cell wall keeps the cell from bursting Turgid Normal Shrinks

In the diagram below, a “cell” with a semipermeable membrane has been placed in a beaker containing substances that are dissolved in water. The membrane is permeable to water. It is NOT permeable to glucose, starch, or salt. 65% Glucose 25 % Glucose 75% H20 35% H20 Each environment must equal to 100%. Based on this information, what is the % of water inside and outside of the cell?

Beaker 1 What is the % of water inside the cell? What is the % of water outside the cell? Will osmosis occur? If so, in what direction will osmosis occur? Will the cell shrink or swell? This diagram show the cell in a(n) hypotonic / hypertonic / isotonic solution. 90% H20 98% H20 98% H20 YES 90% H20 Into cell Swell Hypotonic

Beaker 2 What is the % of water inside the cell? What is the % of water outside the cell? Will osmosis occur? If so, in what direction will osmosis occur? Will the cell shrink or swell? This diagram show the cell in a(n) hypotonic / hypertonic / isotonic solution. 90% H20 70% H20 YES 70% H20 90% H20 Outside of cell Shrink Hypertonic

Beaker 3 What is the % of water inside the cell? What is the % of water outside the cell? Will osmosis occur? If so, in what direction will osmosis occur? Will the cell shrink or swell? This diagram show the cell in a(n) hypotonic / hypertonic / isotonic solution. 90% H20 90% H20 90% H20 YES 90% H20 Both Stays same Isotonic

1. Fill in any missing percentages (water or solute) 1. Fill in any missing percentages (water or solute). Remember each environment must equal 100%. 2. Draw an arrow to show which way the water will move by osmosis. 3. Name the type of solution (hypertonic, isotonic, hypotonic). 60% solute 10% solute 63% H2O Hypotonic Hypertonic Type of Solution: ___________ Type of Solution: ___________