Understanding Concentration of Solutions in Physiology

Concentration of solutions is crucial in understanding the properties of substances in Physiology. This involves concepts like percentage solutions and molar solutions, where the amount of solute is measured in grams or moles relative to the volume of the solution. Percentage solutions are commonly used, while molar solutions relate to the Avogadro number and molecular weights. Examples demonstrate how to calculate the percentage of a solution based on the amount of solute and volume of the solution. In living organisms, concentrations are often measured in milligrams per given volume, such as blood glucose levels.

• Solutions
• Concentration
• Physiology
• Percentage
• Molar

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1. LAB 3 CONCENTRATION OF SOLUTION: CONCENTRATION OF SOLUTION:- - Many of solution properties depending on numbers of molecules, atoms or Ions that presents in solutions. So it is very important to understand the concentrations used in Physiology.

2. PERCENTAGE SOLUTION Percentage Solutions :- Easer and most common style used in concentration depending on percentage of part to hundred percentage of part to hundred , known as percentage percentage . Percentage Percentage: :- - number of grams of solute dissolved in 100 ml of solution. Gm of solute Gm of solute Percentage = Percentage = --------------------- --------------------- * 100ml Volume of solution Volume of solution Percentage Solutions * 100ml

3. PERCENTAGE SOLUTION Ex Ex } A solution concentrate 12 % of glucose that s to say it contain 12 gm of (solute) in 100 ml of D.W. (solution). Or 120 gm in 1000 ml. Ex Ex } 2 gm of Nacl dissolved in 25 ml of D.W. calculate the percentage of this solution .

4. PERCENTAGE SOLUTION Gm of solute Gm of solute -------------------------- * 100ml Volum Volum of solution of solution Percentage = Percentage =-------------------------- * 100ml 2 gm 2 gm ------------------ * 100 = 8 % * 100 = 8 % 25 ml 25 ml = = ------------------

5. PERCENTAGE SOLUTION In living organism most concentrations are much less than grams , so it is easier to estimate these concentrations in milligrams (mg %). Blood glucose is about (90 mg %) that means each 100 ml of blood contain (90 mg) glucose (0.09 %).

6. MOLAR SOLUTION Molar solution (M) Molar solution (M) :- A solution that concentrate (1 M M) ) is containing (1 mole) of solute dissolved in (1 L) of solution , and each 1 mole of solution contain Avagadro Avagadro Number Number {number of particles} which is equal to ( (6.024 6.024 * 10 * 1023 So solutions with the same morality same numbers of particles even if they differs in their molecular or atomic number. Mole: - Measurement that Equivalent the Atomic or molecular weight of a solute in grams. 23). ). morality contain the

7. MOLAR SOLUTION Ex } prepare 1 M of glucose solution , Ex } prepare 1 M of glucose solution , note 180. 180. Weight 180 gm of glucose and dissolved in 1 L of D.W. Weight 180 gm of glucose and dissolved in 1 L of D.W. Or 18 gm dissolved in 100 ml of D.W. Or 18 gm dissolved in 100 ml of D.W. Or 1.8 gm in 10 ml of D.W Or 1.8 gm in 10 ml of D.W. . Another way to Resolve this Ex. By using . Another way to Resolve this Ex. By using . weight 1000ml weight 1000ml M = M = ------------- ------------- * * -------------------- -------------------- M.W. required volume M.W. required volume note that that M.W. M.W. of glucose is of glucose is weight 1000ml weight 1000ml 1 = -------------- -------------- * * ---------------- ---------------- = 180 gm 180 1000ml 180 1000ml 1 = = 180 gm

8. MOLAR SOLUTION Ex} prepare 1 M of Nacl solution, not that M.W. of Nacl is 58.5 . Weight 58.5 gm of Nacl and dissolved in 1 L of D.W. Or 5.85 gm in 100 ml . Or 0.585 gm in 10 ml. Another way to Resolve this Ex. By using . Another way to Resolve this Ex. By using . weight 1000ml M=------------- *-------------------- M.W. required volum