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How to make 1N and 1M H2SO4 ?

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%    ...
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Why our teeths get yellow ?

 Our teeth basically consist of three parts. The outermost part is enamel. Enamel is white in color. Beneath the enamel, there is dentine. It is yellow in color. Then comes the part called pulp, which has blood vessels and nerves.



Now, when we drink or eat acidic fruits and beverages like lemon, orange juice, soft drinks, etc., they erode or wear away the outermost part called enamel and start exposing the yellow color dentine and thus, making teeth appear yellow.




However, did you know that some people's teeth are naturally yellowish?


This is because in such people, the layer of enamel is thin, causing the yellow color of the dentine to appear more clearly and thus, making their teeth appear naturally yellow.

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