0.224g sample that contained only bacl2 and kbr required 19.7ml of 0.1M ango3 to reach the end point. Calculate the percentage of each compound present in the sample. The right answer bacl2 32.4% KBR 67.7%
You need to use 3 solution of drug H containing respectively 50%, 20% and 5% to make 600ml of 10% drug H. How much of the 50% with you use?
To determine how much of the 50% solution you need to use to make 600ml of 10% drug H, we can set up a proportion based on the percentages of the solutions.
Let's assume x represents the volume of the 50% solution needed.
Since we want to make a 10% solution of 600ml, the total amount of drug H in the final solution would be 10% of 600ml, which is 0.10 * 600 = 60ml.
Using the proportion:
(50% solution amount in ml) / (0.50) = (60ml) / (0.10)
Simplifying the equation:
(50% solution amount in ml) * (0.10) = (60ml) * (0.50)
(50% solution amount in ml) = (60ml) * (0.50) / (0.10)
(50% solution amount in ml) = 600 / (0.10)
(50% solution amount in ml) = 6000
Therefore, you need to use 6000ml (or 6 liters) of the 50% solution to make 600ml of 10% drug H.