After removing outer shell of two eggs in dilute HCl one egg is placed in distilled water and other is placed in saturated NaCl . what are observations and why?
Salt concentration inside the egg is higher than water but less than saturated NaCl solution. So if the egg (after removing the outer shell) is placed in water, water will go inside through the semipermeable membrane (osmosis occurs) and egg will swells up. In salt solution osmosis will occur and flow of water is opposite direction , water will come out of the egg and egg will shrink in size.