I'm supposed to find the mass of NaCl in 1 L & the mass of H20 in 1 L.
I'm given NaCl solution.
1% by mass.
The Density is 1.071 g/mL.
I know the answer for NaCl is 10.71 g, but I don't know where to start to get to this. Could you lead me in the right direction?
1% NaCl (w/w) means 1 g NaCl/100 g solution. Since the solution has a density of 1.071 g/mL, the 100 g solution must have a volume of v = m/d = 100/1.071 = 93.37 mL so we actually have 1g NaCl in 93.37 mL. We want to know how much is in 1 L.
1 g NaCl x (1000 mL/93.37 mL) = 10.71 g NaCl/L. Now for the water. If 1 L (and the mass is??) of the solution consists of 10.71 g NaCl and the remainder is water, how much is water? .
would it be 89.28 g?
No. 1 L doesn't weigh 1000 g does it? What is the mass of 1 L? Isn't it mass = volume x density?
would you multiply the 93.37 and the 1.071 then? is 100g correct?
To find the mass of NaCl in 1 L of a 1% solution, you need to consider both the percentage by mass and the density of the solution. Here's how you can calculate it:
Step 1: Understand the given information.
- Percentage by mass: 1% (1 g NaCl per 100 g solution)
- Density: 1.071 g/mL (grams of solution per milliliter)
Step 2: Determine the volume of the solution in liters.
- Since you are given the density of the solution, you can convert it to the volume using the formula:
Volume (in mL) = Mass (in g) / Density (in g/mL)
- In this case, for a 1 L solution, you need to convert 1 L to mL, which is 1000 mL.
Step 3: Calculate the mass of NaCl in the solution.
- Since the solution is 1% by mass, you can treat 1 L of the solution as 1% of the total mass.
- 1% by mass means that 1 g of NaCl is present in 100 g of the solution.
- So, if you have 1 L of the solution (1000 mL), there will be 10 times more NaCl because you have 10 times more solution.
- To find the mass of NaCl in the solution, use the formula:
Mass of NaCl = (Volume of solution in L) × (Percentage by mass)
Using these steps, let's calculate the mass of NaCl in 1 L of the 1% solution:
Step 1: Given information:
- Percentage by mass: 1%
- Density: 1.071 g/mL
Step 2: Volume of the solution:
- Convert 1 L to mL: 1 L × 1000 mL/L = 1000 mL
Step 3: Mass of NaCl in 1 L of the solution:
- Mass of NaCl = (Volume of solution in L) × (Percentage by mass)
= (1000 mL / 1000 mL) × (1%)
= 10 g
Therefore, the mass of NaCl in 1 L of the 1% solution is 10 g.