What is pka of acid?
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What is specific conductivity?
what is the detector used in ir spectroscopy
What is the basicity/acidity of na2co3
Why we use potassium dichromate in control of absorbance in uv region and copper sulphate in control of absorbance in visible region?
What is Valency ?
what is the difference between heat and temperature?
What is gas-filled lamp ?
why PH scale range is 14? why it is not less or not greater than 14? solution of HCl or hydrogen containing liquid has a PH. but if the solution is KMnO4 here not hydrogen power does it PH? explain plz....
Explain about Atomic Weight ?
who invented the first projector?
What is positive testing in relation to chemistry? For example, the sentence reads "Sample solutions are solutions known to contain one of each of the following ions, silver ion, Ag+(aq), barium ion, Ba2+(aq), and iron (III) ion, Fe3+(aq). Testing solutions are the solutions containing a polyatomic ion that can react with one of the metal ions to give a positive test." I am then asked to define what a "positive test" is. I am currently a student who is pretty new to chemistry, please try and make your answer as simply as possible. Thanks for the help.
Why ph scale range is 14? Why it is not less or not greater than 14?