A solution contains 2 mEq/ml of KCL (Molecular weight 74.5). If a 20 ml ampule of this solution is diluted to 1 liter what is the percent strength of the resulting solution?
Well, well, well, let's math it up, shall we? First, we need to find out how many milliequivalents (mEq) are in that 20 ml ampule of KCL solution. Since it contains 2 mEq/ml, we multiply 2 by 20, which gives us 40 mEq.
Now, we dilute this 20 ml ampule to make a 1-liter solution. But hey, what's the percent strength of this resulting solution? To figure that out, we divide the number of milliequivalents (40 mEq) by the total volume of the solution in milliliters (1000 ml). Then we multiply that value by 100 to get the percentage.
So, let's do the math: 40 mEq ÷ 1000 ml = 0.04. Now multiply that by 100, and voila! The resulting solution is a 4% strength solution.
Just remember, I'm not a pharmacist, but I sure know how to add some clownish fun to math problems!
To find the percent strength of the resulting solution, we need to calculate the total amount of KCL in the diluted solution and compare it to the total volume.
Step 1: Calculate the amount of KCL in the 20 ml ampule.
The concentration of KCL in the ampule is given as 2 mEq/ml.
Since the volume of the ampule is 20 ml, the amount of KCL in the ampule is:
2 mEq/ml * 20 ml = 40 mEq
Step 2: Calculate the total volume of the resulting solution.
By diluting the 20 ml ampule to 1 liter, the total volume of the solution becomes 1000 ml.
Step 3: Calculate the concentration of the resulting solution.
Divide the amount of KCL (40 mEq) by the total volume of the solution (1000 ml):
Concentration of resulting solution = 40 mEq / 1000 ml = 0.04 mEq/ml
Step 4: Convert the concentration to percent strength.
Multiply the concentration by the molecular weight of KCL (74.5) to get the mass of KCL in grams per liter:
0.04 mEq/ml * 74.5 g/mEq = 2.98 g/L
Finally, convert the mass of KCL to a percentage:
(2.98 g / 1000 ml) * 100 = 0.298% strength
Therefore, the resulting solution is approximately 0.298% strength of KCL.
To find the percent strength of the resulting solution after dilution, we need to calculate the amount of KCL in the final solution and express it as a percentage of the total volume.
First, let's calculate the total amount of KCL in the 20 ml ampule:
2 mEq/ml * 20 ml = 40 mEq
Next, we need to convert the mEq of KCL to grams using the molecular weight of KCL:
40 mEq * (74.5 g/mEq) = 2980 g
Now, let's calculate the final volume of the solution after dilution. Since we are diluting 20 ml of the solution to 1 liter (1000 ml), the total volume becomes:
20 ml / 1000 ml = 0.02
Now we can determine the percent strength by dividing the amount of KCL by the final volume and multiplying by 100:
(2980 g / 0.02) * 100 = 149000%
Therefore, the percent strength of the resulting solution is 149000%.
0.039
2 mEq/mL x (20 mL/1000 mL) = 0.040 mEq/mL or 4.0 mEq/100 mL.
How many grams do you have in 4.0 mEq? That's 4.0 mEq x mEq wt = 4.0 x 0.0745 = about 0.003g/100 which makes it about 0.003% (and that's percent w/v).