Now let's see how to make 1 N and 1M H2SO4 from 98% concentrated H2SO4 . This calculation varies with concentration of H2SO4. Because density varies with concentration of H2SO4 . Now we are having density 1.84 for 98% concentrated H2SO4. If you are going to use less concentrated H2SO4 then first find out density of it then put that value in below formula instead of 1.84 H2SO4 is liquid, so at first we need to convert H2SO4 molecular weight (gm) into volume (ml) let's use formula density = mass / volume volume = mass of HCl / density 98.08 / 1.84 V = 53.30 ml Here we are making 1M and 1N H2SO4 from 98% concentrated H2SO4. If you are going to use less concentrated H2SO4 then use that percentage value in below formula rather than 98%. Let's use formula 1M H2SO4 (98%) = 53.30 ml [ V ] 100% ...
Dry ice is basically solid carbon dioxide and it's chemical formula is CO₂.The surface temperature of a dry ice block is about -78 degrees Celsius or -109 degrees Fahrenheit. This means it is much cooler than ordinary ice which is made up of water.
If dry ice comes in contact with our skin, our cells begin to freeze and die within seconds, thus giving us severe frostbite. In addition to this, storing dry ice in airtight containers can be dangerous.
Do you know why?
This is because dry ice sublimates, i.e., it directly gets converted from solid state to gaseous state. Hence, in airtight containers, the gas produced can build up and exert pressure on the walls of container which can lead to a dangerous explosion.
Dry ice is dangerous but it is also useful as cooling agent and to create dramatic scenes in theater by using fog machines.
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