Question: please answer both questions 1.1 Should we ignore changes in density of water when dealing with high concentration of sludge or liquid chemicals, explain your

please answer both questions
please answer both questions 1.1 Should we ignore changes in density of

1.1 Should we ignore changes in density of water when dealing with high concentration of sludge or liquid chemicals, explain your answer? (3) 1.2 Why the colloids particles are often suspended in water and can't be removed by sedimentation only? How can we address this problem? (3)

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