Required information Solute concentration is defined as the amount of the solute
ID: 143190 • Letter: R
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Required information Solute concentration is defined as the amount of the solute present in a given volume of solution. The concentrations of solutes in a solution are key to their ability to produce physiological actions. One measure of the amount of a substance is its mass expressed in grams. The unit of volume in the metric system is a liter (L). The concentration of a solute in a solution can then be expressed as the number of grams of a substance present in any one liter of solution (g/L) A comparison of the concentrations of two different substances on the basis of the number of grams per liter of solution does not directly indicate how many molecules of each substance are present. Thus, concentrations are expressed based upon the number of solute molecules in solution, using a measure called the molecular weight. One mole (mol) of a compound is the amount of the compound in grams equal to its molecular weight. One mole of solute dissolved in a liter of water is known as a 1 molar solution(1 mol/L). To practice calculating molecular weight and examining the relationship between volume and solute variations, complete the following exercises. Referring to the calculations and graphs you just completed, select all of the following which are TRUE regarding molarity. The atomic number of the solute, the amount of solute in grams, and the final volume of solution are all necessary to calculate molarity. Molarity can be defined as the moles of solution per liter of solute. A doubling of the volume of the final solution cuts the molarity in half. Doubling the amount of solute equates to a doubling of molarity. Molarity of a solution can be defined as the moles of solute per liter of solution. Units of molarity can include mmo/L and nmol/L.Explanation / Answer
The following statements are true
The atomic number of solute, amount of solute in grams and the final volume of solution are all necessary to calculate molarity.
It is for the fact that in order to find moles of solute, we do need to refer the atomic number of the solute by looking it up into the periodic table. The amount of solute in grams is also necessary to find out the moles of solute.
Does doubling of the volume of the final solution cuts the molarity in half
On adding water to the final volume there will be no chance in the number of moles of the solvent but it does increase the overall volume of the solution. With this increase due to the dilution the molarity tends to decrease.
Doubling the amount of solute equates to a doubling of molarity
Yes, with the increase in the amount of the solute, it is going to increase the molarity. If we are doubling the solute amount in this case it is going to double the molarity.
Molarity of a solution can be defined as moles of solute per litre of solution
This is the formulae which help in the calculation of the molarity.
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