Enter a range of values for x, 2x+10, 14
1 answer:
You might be interested in
Answer:
They must weight 199.76 g of Ca and dilute it in a flask of 2.5 L.
Explanation:
We need to prepare the whole solution and at the end we will slip it in 10 beakers.
Data:
Number of beakers to prepare: 10
Each beaker requires: 250 mL
Total solution volume to prepare = Vt = 10 beakers * 250 mL = 2500 mL = 2.5 L
First step:
We need to use Molarity formula to get amount of solute to weight for the whole solution (Vt = 2.5 L)
Molarity (M) formula is:
where:
M: concentration of the solution expressed in Molarity (mol/L)
mol CaCl2: amount of solute expressed in mol
Vt: total volume of the solution to be prepared. Volume must be expressed in liters (L)
Step 2: Calculate amount of solute
We know concentration of the solution (M = 0.720 M) and also we know total volumen (Vt), then we will despejate mol of CaCl2 (quantity of solute):
Now we need to use molar mass of Ca (110.98 g/mol) to transform mol of
in grams of
:
Finally, this group of students must weight 199.76 g Ca and dilute it in a flask of 2.5 L, then they will prepare a solution of Ca
0.72M. Then must be placed 250 mL of prepared solution in each beaker.