when milk of magnesia change what is the colour of milk of magnesia is red blue litmus
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Answer:
Color Changing Milk of Magnesia
How Antacids Work in Your Stomach
Sometimes great food and heartburn go hand in hand. Many people rely on products like Milk of Magnesia to settle their stomachs, but have you ever wondered how those antacids really work? This highly visual demonstration uses some cool color changing chemistry to show you exactly how Milk of Magnesia neutralizes the acids in your stomach and saves the day after a great meal.
Experiment
Place about 100 mL of Milk of Magnesia in a 500 mL beaker and dilute with tap water until the beaker is about half full.
Add about 10 mL of Universal Indicator. (The Universal Indicator will provide the sharp color change you see in the video). Remember that Universal Indicator will turn red on the far acidic end of the scale and dark blue on the alkaline side.
Use the magnetic stirrer to create a steady mix of the liquids. If you don't have a magnetic stirrer, hire a kid to stir it by hand. You'll see that the solution turns a light blue, indicating that it is slightly basic due to the small amount of the Mg(OH)2.
While stirring the solution, add 10-20 mL of vinegar (it doesn't have to be precise) and observe the rapid color change. The mixture quickly changes to red because the acid disperses throughout the beaker.
The acid neutralizes the small amount of hydroxide ion from the Mg(0H)2 that has dissolved first, then turns the solution acidic. However, as more of the Mg(0H)2 from the suspensions gradually dissolves into solution, the acid is neutralized and eventually the solution becomes basic.
You'll hear screams of “Do it again!”… and why not? Add more vinegar and watch as the liquid goes from red to orange to yellow to green and eventually settles at the bluish-purple color. In other words, the mixture changes through the entire Universal Indicator color range!
In time, all of the vinegar (acid) will react with the magnesium hydroxide and the solution will remain red.