Tonicity and Osmosis are closely related. It is a comparative term which describes the concentration of one solution as compared to another solution. Its the capability of one solution to modify the volume of cells by altering their water content. But what is a concentration?
Concentration describes the amount of solutes dissolved in a solution
Solutions are made up of two parts
(A) Solute- the solid part e.g. salt
(B) Solvent- the liquid part e.g. Water
Solute+ Solvent= Solution
There are three types of tonicity,
Hypertonic
This when a solution has a higher concentration of solutes (more dissolved particles) than another. 80%+20% = 100%
Hypotonic
This is when a solution has less solutes and more solvents than another.
20%+80% =100%
Isotonic
This is when a solution has equal amounts of solvents and solutes as another.
50%+50% =100%
Tonicity helps us determine how and where particles move! The following video explains how tonicity work, after watching complete table 1.0 with your observations and explanations.
Hypertonic Solution
Blood cells placed in an hypertonic solution will have a lower concentration of solutes (dissolved particles) than the solution itself. This means that water would be greatest within the blood cell and will therefore leave the cell to where its lower. The cell will therefore become flaccid and can be compared to a deflated balloon that was once filled with water.
Hypotonic Solution
Blood cells placed in an hypotonic solution will have a higher concentration of solutes (dissolved particles) than the solution. Water is therefore lesser in the blood cell and will take in water to where there's less. The cell will therefore become larger or swell (turgid) and can be compared to a balloon filled with water.
Isotonic Solution
Blood cells placed in an isotonic solution will have the same concentration of solutes (dissolved particles) to that of the solution. Water will therefore be of similar volume inside and outside the cell making the cell normal.
Table 1.0 observe and explain the changes seen in each raisins
Concentration- a concentration is the amount of solutes dissolved or present in a solution
ReplyDeleteConcentration describes the amount of solutes dissolved in a solution
ReplyDeleteConcentration refers to the amount of solute (the substance being dissolved) in a solution, usually expressed as the amount of solute per unit of solvent or solution (e.g., moles per liter).
ReplyDeleteFor the table:
ReplyDeleteHypertonic- The raisin started to swell, reason for that is that there was a low concentration of water molecules inside the raisin in comparison to the outside. As a result the water molecules started to move from outside to the inside of the raisins.
Hypotonic: This is basically the opposite of hypertonic so when the raisins were placed in sugar syrup the concentration of the water molecules were higher in the raisins and so they started to move to less concentrated area resulting in the raisins going back to their original size.
Isotonic: The raisin would remain the same as the concentration on either side are the same. There would be no hypertonic or hypotonic taking place
Nice touch adding diagrams to explain it really rounded out the lesson
ReplyDeleteConcentration is the amount/percentage of solute in a solution eg. The number of litres of apple juice in fruit punch is its concentration of apple juice.