If 50.0 g of NaCl is mixed with 100.0 g of water at 80.0 °C, how much will not dissolve?
If the solubility of NaCl @ 80.0 C is 39 g/100 g water, then 11 grams (50-39) will not dissolve.
What's the solubility of NaCl at 80.0 C?
about 39
To determine how much sodium chloride (NaCl) will not dissolve in water, we need to calculate the solubility of NaCl at the given temperature and compare it to the amount of NaCl in the mixture.
1. Find the solubility of NaCl at 80.0 °C. This can be done by looking up a solubility table or consulting the solubility chart. Let's assume the solubility is 40 g of NaCl per 100 g of water at 80.0 °C.
2. Calculate the maximum amount of NaCl that can dissolve in 100.0 g of water at 80.0 °C. Since the solubility is 40 g NaCl per 100 g water, we can calculate it using the following formula:
Maximum amount of NaCl = (solubility / 100 g) * (mass of water)
Maximum amount of NaCl = (40 g / 100 g) * (100.0 g) = 40.0 g
3. Compare the maximum amount of NaCl that can dissolve with the actual amount of NaCl in the mixture. In this case, there are 50.0 g of NaCl present.
Amount of NaCl that will not dissolve = Actual amount of NaCl - Maximum amount of NaCl that can dissolve
= 50.0 g - 40.0 g
= 10.0 g
Therefore, 10.0 g of NaCl will not dissolve in the mixture of 50.0 g NaCl and 100.0 g of water at 80.0 °C.