by referring to the figure below, determine the mass of each of the following salts required to form a…
by referring to the figure below, determine the mass of each of the following salts required to form a saturated solution in 250 g of water at 15°c.\n(a) kno₃\n(b) kclo₃\n(c) nano₃
Answer
Explanation:
Step1: Find solubility at 15°C
From the graph, the solubility of $KNO_3$ at 15°C is about 25 g per 100 g of water.
Step2: Calculate mass for 250 g water
Set up a proportion $\frac{m}{250}=\frac{25}{100}$, where $m$ is the mass of $KNO_3$. Solving for $m$, we get $m = \frac{25\times250}{100}=62.5$ g.
From the graph, the solubility of $KClO_3$ at 15°C is about 10 g per 100 g of water. Set up a proportion $\frac{m}{250}=\frac{10}{100}$, solving for $m$, we get $m=\frac{10\times250}{100} = 25$ g.
From the graph, the solubility of $NaNO_3$ at 15°C is about 80 g per 100 g of water. Set up a proportion $\frac{m}{250}=\frac{80}{100}$, solving for $m$, we get $m=\frac{80\times250}{100}=200$ g.
Answer:
(a) 62.5 g (b) 25 g (c) 200 g