What is wave number?
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Explain extraction of ephedrine from a mineral block?
What is Acids, Bases salts ?
Why is air removed from the electric lamps ?
What are the electrodes used in potentiometer titration?
What is Evaporation ?
why do hard water never produce foam when a soap is dissolved?
How is the accuracy of the method determined?
What is weak acid?
Which element is liquid at ordinary temperature ?
What is the Chemical Combination ?
Explain the Compound?
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.