If a solution is made by dissolving 1 g NaCl in sufficient water to make 10 mL of solution, the composition of the solution is what % w/v?
I keep getting 10 000% but that doesn't seem right at all. Can someone check this for me. Thanks to anyone who helps
sure. show the steps you used to calculate it, and we can help see where or whether you went wrong.
R_Scott told you that your answre of 10% was good at 1:22 A.M. It should still be a good answer.
Here are my steps:
Mass % = mass of solute (g) / volume of solution (L) x 100%
= 1 /0.01 x 100%
= 10 000%
It appears to me that 10 000 does not mean 10.000%. I would use a period to avoid confusion. In the U. S. I would write that as 10.000%.
Oh no, the question that R_scott answered was a different one
To determine the weight/volume (w/v) percentage of a solution, you need to divide the weight of the solute (in grams) by the volume of the solution (in mL) and multiply by 100.
In this case, you have dissolved 1 g of NaCl in sufficient water to make a 10 mL solution. So, to find the w/v percentage:
w/v % = (weight of solute / volume of solution) * 100
Substituting the given values:
w/v % = (1 g / 10 mL) * 100
Now, it's important to note that the volume of the solution is given in milliliters (mL), and percent represents parts per hundred. Therefore, the unit needs to be adjusted to grams per 100 mL.
To convert mL to grams per 100 mL:
w/v % = (1 g / 10 mL) * (100 mL / 1) = 10 g/100 mL
Finally, we need to express this result as a percentage:
w/v % = 10 g/100 mL * 100 = 10%
Therefore, the solution you have described is a 10% w/v NaCl solution, not 10,000%.