Pagina de inicio
/
Química
/
Question 2 (2 points) George wants to make a 0.1M solution of LiCl.He carefully measures 69g of lithium chloride into a flask and adds 100mL of water.He stirs the solution until all of the crystals are dissolved What is the result? a.George used grams instead of moles in his calculation. His solution has a molarity of 70moles/L. b George did not calculate the molar mass of LiCl correctly. His solution has a molarity of 2moles/L George correctly made the solution d George's calculation included mL.instead of L. His solution has a molarity of 0.001moles/L. e George should not have stirred the solution. His solution's molarity would have been correct otherwise. George did not use the correct amount of water. His solution has a molarity of 10moles/L

Problemas

Question 2 (2 points)
George wants to make a 0.1M solution of LiCl.He carefully measures 69g of lithium chloride into a flask and adds 100mL of water.He stirs the
solution until all of the crystals are dissolved What is the result?
a.George used grams instead of moles in his calculation. His solution has a molarity of 70moles/L.
b George did not calculate the molar mass of LiCl correctly. His solution has a molarity of 2moles/L
George correctly made the solution
d George's calculation included mL.instead of L. His solution has a molarity of 0.001moles/L.
e George should not have stirred the solution. His solution's molarity would have been correct otherwise.
George did not use the correct amount of water. His solution has a molarity of 10moles/L

Question 2 (2 points) George wants to make a 0.1M solution of LiCl.He carefully measures 69g of lithium chloride into a flask and adds 100mL of water.He stirs the solution until all of the crystals are dissolved What is the result? a.George used grams instead of moles in his calculation. His solution has a molarity of 70moles/L. b George did not calculate the molar mass of LiCl correctly. His solution has a molarity of 2moles/L George correctly made the solution d George's calculation included mL.instead of L. His solution has a molarity of 0.001moles/L. e George should not have stirred the solution. His solution's molarity would have been correct otherwise. George did not use the correct amount of water. His solution has a molarity of 10moles/L

Solución

avatar
Brunomaestro · Tutor durante 5 años
expert verifiedVerificación de expertos
4.7 (233 votos)

Responder

George did not use the correct amount of water. His solution has a molarity of 16.3 moles/L.

Explicar

## Step 1<br />First, we need to calculate the molar mass of LiCl. The molar mass of LiCl is calculated by adding the molar mass of Lithium (Li) and Chlorine (Cl). The molar mass of Li is approximately 6.94 g/mol and the molar mass of Cl is approximately 35.45 g/mol. Therefore, the molar mass of LiCl is \(6.94 g/mol + 35.45 g/mol = 42.39 g/mol\).<br /><br />## Step 2<br />Next, we need to calculate the number of moles of LiCl. The number of moles is calculated by dividing the mass of the substance by its molar mass. In this case, George has 69g of LiCl. So, the number of moles of LiCl is \(69g / 42.39 g/mol = 1.63 moles\).<br /><br />## Step 3<br />Now, we need to calculate the molarity of the solution. The molarity (M) is calculated by dividing the number of moles of solute by the volume of the solution in liters. In this case, George has 1.63 moles of LiCl and the volume of the solution is 100 mL, which is equivalent to 0.1 L. So, the molarity of the solution is \(1.63 moles / 0.1 L = 16.3 M\).<br /><br />## Step 4<br />Finally, we compare the calculated molarity with the desired molarity. The calculated molarity is 16.3 M, which is not equal to the desired molarity of 0.1 M. Therefore, George did not correctly make the solution.
Haz clic para calificar: