Answered step by step
Verified Expert Solution
Question
1 Approved Answer
A seashore sand mixture contains 85% insoluble sand, 12% salt, and 3% water by weight. 100 kilograms of this mixture is to be washed
A seashore sand mixture contains 85% insoluble sand, 12% salt, and 3% water by weight. 100 kilograms of this mixture is to be washed by batch operations so that it will contain less than 0.2% salt after drying. In each washing, the sand mixture is mixed with 200 kilograms of water and the resulting saline solution is discarded. The sand mixture retains 0.5 kilograms of water per kilogram of insoluble sand after each washing. Note that the mixture is not dried between washings. (a) How many washings with 200-kg batches of water are required to give the desired purity of the sand? (b) Derive a general expression for the weight fraction of salt in the dried mixture after N washings. Note that the solubility of salt in water is 35.7 kg salt per 100 kg of water.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started