A 200 mL NaCl solution with a concentration of 4.0 g/L is mixed with a 600 mL solution containing 8% NaCl (m/v).
What is the final concentration of salt in the solution in g/L?
So...........................
Anyone know the answer.......?
the answer is 61 g/L. i went to brainly and got the answer lol. took the test and it was right.
To find the final concentration of salt in the solution, we need to calculate the amount of salt present in each of the two solutions and then add them together.
Let's start with the first solution, which is a 200 mL NaCl solution with a concentration of 4.0 g/L. The amount of salt in this solution can be calculated using the formula:
Amount of salt = Volume of solution * Concentration of salt
Here, the volume of solution is given as 200 mL, which is equivalent to 0.2 L, and the concentration of salt is given as 4.0 g/L, so we can calculate the amount of salt in this solution:
Amount of salt in the 200 mL solution = 0.2 L * 4.0 g/L = 0.8 g
Now let's move on to the second solution, which is a 600 mL solution containing 8% NaCl (m/v). The percentage concentration means that there are 8 g of salt in every 100 mL of solution. We can calculate the amount of salt in this solution as follows:
Amount of salt in the 600 mL solution = (600 mL * 8 g) / 100 mL = 48 g
Finally, we can find the total amount of salt in the final solution by adding the amounts of salt from each solution:
Total amount of salt in the final solution = Amount of salt in the 200 mL solution + Amount of salt in the 600 mL solution
= 0.8 g + 48 g
= 48.8 g
To find the final concentration of salt in the solution, we divide the total amount of salt by the total volume of the solution, which is the sum of the volumes of the two solutions:
Final concentration of salt = Total amount of salt / Total volume of solution
The total volume of solution is 200 mL + 600 mL, which is 800 mL or 0.8 L, so we can calculate the final concentration of salt:
Final concentration of salt = 48.8 g / 0.8 L
= 61 g/L
Therefore, the final concentration of salt in the solution is 61 g/L.