1. Jeevitha, an internship programme student in the lab, is trying to weigh agarose and NaCl for
Agarose gel electrophoresis. She weighed 1.80 g of agarose in the weighing balance and starts her
work. In the middle, she unfortunately spills agarose. To start again, she weighs the chemical
again. However, the display shows 2.22 g even when she uses the same amount as before. So, she
uses another weighing balance twice and the value is still 2.22 g. What could have been the
problem?
Answers
Explanation:
Osmosis Experiment: Dissolving Egg Shells With Vinegar
How does osmosis keep you healthy?
Right now, as you read this, there are millions of things happening throughout your body. The food you ate just a bit ago is making its way through a watery slurry inside your stomach and
small intestines. Your kidneys are working hard to excrete waste and extra water. The lacrimal glands near your eyes are secreting tears, which allow your eyelids to close without damaging your eyeballs. What’s one thing that all of these processes have in common? They all rely on osmosis: the diffusion of water from one place to another.
Osmosis factors heavily in each of these processes and is an important force for keeping every single cell in your body healthy. Osmosis is hard to see without a microscope. But if we create our very own model of a cell, using a shell-less chicken egg, we can see what happens when we manipulate the osmotic balance in the “cell”!