Find molarity of 20%aqous soluion of amino . the density of the solution is 1.4 grams/ml
Please follow directions.
School Subject:_______________ (Examples: math, science, algebra, geography)
20% mens 20g amino acid in 100 g solution.
mols amino acid = grams/molar mass. You don't say what amino acid it is so look it up and use the molar mass.
Then use density to convert 100 g solution to volume. Finally, substitute into M = mols/L solution. Post your work if you get stuck.
To find the molarity of a solution, we need to know the concentration of the solute in moles and the volume of the solution in liters. In this case, the concentration is given as a percentage (%), and the density is also provided.
First, we need to calculate the mass of solute in the solution. We can assume that we have 100 ml of the solution, as it is a common unit for percentage solutions. Therefore, the mass of amino in this 100 ml solution can be calculated as follows:
Mass of solute = density x volume
= 1.4 g/ml x 100 ml
= 140 g
Next, we need to convert the mass of the amino into moles. To do this, we need the molar mass of amino. Let's assume the molar mass of amino is 100 g/mol (just as an example). We can then calculate the number of moles of amino as:
Number of moles = Mass of solute / Molar mass
= 140 g / 100 g/mol
= 1.4 mol
Finally, to find the molarity, we need to divide the number of moles by the volume of the solution in liters. Since we assumed a volume of 100 ml initially, we need to convert it to liters:
Volume of solution = 100 ml / 1000 (to convert ml to liters)
= 0.1 L
Now we can calculate the molarity of the solution:
Molarity = Number of moles / Volume of solution
= 1.4 mol / 0.1 L
= 14 M
Therefore, the molarity of the 20% aqueous solution of amino is 14 M.