You don’t have to answer everything, whatever you know could be really helpful
1 answer:
You might be interested in
Answer:
Mole percent of in solution is 1.71%
Explanation:
Number of moles of a compound is the ratio of mass to molar mass of the compound.
Molar mass of = 110.98 g/mol
Molar mass of = 18.02 g/mol
Density is the ratio of mass to volume
So, mass of 60.0 mL of water =
Hence, 6.50 g of =
of
= 0.0586 moles of
60.8 g of =
of
= 3.37 moles of
So, mole percent of in solution = \frac{n_{CaCl_{2}}}{n_{total}}\times 100% =
% = 1.71%
Answer:
Explanation:
Hello!
In this case, in a dilution process, water is added to a solute in order to decrease its concentration but increase the volume of the solution. It means that if we have 20.0 mL of a 12.0-M solution of HCl and we want a 0.500-M solution, we need to apply the following formula considering that the moles remain unchanged:
Thus, solving for the final volume is:
So plugging in the values we obtain:
Now, since the initial volume of acid was 20.0 mL and the final volume is 480 mL, the added volume of distilled water is:
Best regards!