How many grams of water is required to make saturated solution of 100 grams of KNO3 at 100°C if solubility at 100°C is 20? O a. 100 O b. 200 O c. 300 O d. 500
Answers
Answer:
a.100
Explanation:
I remember answering this exact question yesterday . I explained to you then that there is no merit in saying: “ if solubility at 100°C is 20?” without adding any units. I see that Rob Thomas has also advised you in the exact same way.
In my earlier answer I also advised that KNO3 is an extremely soluble compound - solubility at 100°C = 245g / 100g water. This is a saturated solution at 100°C .
If you want to dissolve 100g KNO3 , you will require:
Mass of water = 100g KNO3 / 245gKNO3 * 100g H2O = 41g H2O required.
I cannot relate the number 20 with anything connected to this question.
Can I advise you: There are many people out here waiting to help you . But they can only help you to the extent that you allow them to do so. If you submit a question which is pointed out to you contains some error or other illogical text - then there is little point in wasting time by resubmitting the exact same question later . Make every effort to correct the error that has been pointed out to you . BUT best of all submit the exact original unaltered question exactly as it appears in the book or question paper . That way there is little chance of an error.
I look forward to you resubmitting the correct data so that you can then be helped.