What does a saline solution of 0.9% mean quantitatively? (Per 100 gram solution; percent by mass)
0.9 g NaCl + 99.1 g H2O.
Thanks!
A saline solution of 0.9% means that for every 100 grams of the solution, 0.9 grams is sodium chloride (NaCl) and 99.1 grams is water (H2O).
To understand this quantitatively, you need to calculate the mass of each component based on the given percentage.
In this case, the percentage is given as 0.9% (0.9 grams per 100 grams).
To find the mass of NaCl, you multiply 0.9 grams by the total mass of the solution (100 grams) and divide by 100:
0.9 grams × 100 grams / 100 = 0.9 grams
So, there are 0.9 grams of NaCl in the solution.
To find the mass of water, you subtract the mass of NaCl from the total mass of the solution:
100 grams - 0.9 grams = 99.1 grams
Therefore, in a saline solution of 0.9%, you have 0.9 grams of NaCl and 99.1 grams of water in every 100 grams of the solution.