A Certain Chemical Dissolves in Water at a Rate Proportional

question 64

Short Answer

A certain chemical dissolves in water at a rate proportional to the product of the amount of chemical that had not yet been dissolved and the difference between its concentration in a saturated solution and its current concentration.
It is known that 100 g of the chemical are dissolved in 200 g of saturated solution. If 60 g of the chemical are added to 200 g of water, 20 g are dissolved in 2 h.
How many grams of the chemical are dissolved in 4 h?

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Definitions:

Behavior Change

The process of altering or modifying actions, habits, or thoughts to improve health or reach personal goals.

Modeling

Behaviors learned by observing and imitating others.

Stimulus Control

Involves modifying the environment to reduce cues that trigger undesirable behaviors and enhance cues that lead to desired behaviors.

Whole Wheat Bread

Bread made from flour that contains the entire grain, including the bran, germ, and endosperm, offering more nutrients than refined bread.