a) 2500 x 0.9 = ?? g solute in 2500 g solution.
b)0.050kg = 50 g
50 g x 0.04 = ?? g solute in 50 g solution.
a)2500g of saline solution (0.90% NaCl (m/m))
b)0.050kg of 4.0% (m/m) MgCl2
b)0.050kg = 50 g
50 g x 0.04 = ?? g solute in 50 g solution.
grams of solute = (mass of solution) x (percent mass of solute / 100)
In this case, the mass of the solution is given as 2500g and the percent mass of NaCl is 0.90%. Plugging these values into the formula, we get:
grams of solute = (2500g) x (0.90 / 100) = 22.5g
So, to make a 2500g saline solution with 0.90% NaCl, you would require 22.5g of NaCl. Hope that adds some flavor to your chemistry calculations!
b) Now, let's handle that magnesium chloride situation! To calculate the grams of solute in a 4.0% (m/m) MgCl2 solution, we'll use the same formula as above:
grams of solute = (mass of solution) x (percent mass of solute / 100)
In this case, the mass of the solution is given as 0.050kg (notice how the kg changed from g – kilograms be fancy like that) and the percent mass of MgCl2 is 4.0%. Plugging these values into the formula, we get:
grams of solute = (0.050kg) x (4.0 / 100) = 0.002g
So, to make a 0.050kg solution with 4.0% MgCl2, you would require a mere 0.002g of MgCl2. Not too shabby, huh?
Mass of solute = (Percentage concentration/100) x Mass of solution
a) For the 2500g of saline solution (0.90% NaCl (m/m)):
Mass of solute = (0.90/100) x 2500g
Mass of solute = 0.009 x 2500g
Mass of solute = 22.5g
Therefore, you would need 22.5 grams of NaCl to make 2500g of a saline solution with a concentration of 0.90% NaCl (m/m).
b) For the 0.050kg of 4.0% (m/m) MgCl2:
First, we need to convert 0.050kg to grams:
0.050kg = 50g
Mass of solute = (4.0/100) x 50g
Mass of solute = 0.04 x 50g
Mass of solute = 2g
Therefore, you would need 2 grams of MgCl2 to make 0.050kg (or 50g) of a solution with a concentration of 4.0% (m/m) MgCl2.
a) 2500g of saline solution (0.90% NaCl (m/m)):
Step 1: Convert the percentage to a decimal: 0.90% = 0.009 (0.90/100 = 0.009).
Step 2: Calculate the mass of NaCl required by multiplying the total mass of the solution by the decimal mass percent:
Mass of NaCl = 2500g * 0.009 = 22.5g
Therefore, you would need 22.5 grams of NaCl to make a 2500g saline solution with a 0.90% NaCl concentration.
b) 0.050kg of 4.0% (m/m) MgCl2:
Step 1: Convert 0.050kg to grams: 0.050kg*1000g/kg = 50g.
Step 2: Convert the percentage to a decimal: 4.0% = 0.040 (4.0/100 = 0.040).
Step 3: Calculate the mass of MgCl2 required by multiplying the total mass of the solution by the decimal mass percent:
Mass of MgCl2 = 50g * 0.040 = 2.0g
Therefore, you would need 2.0 grams of MgCl2 to make a 0.050kg solution with a 4.0% MgCl2 concentration.