The spaces below represent portions of some of the main groups and periods of th

Question

The spaces below represent portions of some of the main groups and periods of the periodic table. In the proper squares, write the correct formulas for the chlorides, oxides, and sulfates of the elements of Croups I. II and III. Likewise, write the formulas of the compounds of sodium, calcium, and aluminum with the elements of Croups VI and VII. Two of the squares have been completed as examples. What is the systematic name of water? Whit is the name of water when viewed as an acid (which it is)? If sulfate has the formula SO_4^2-, then what Is the formula of the thlosulfate ion? (See footnote 3 for the meaning of the prefix thio.) If glutamic acid has the formula HC_3 H_g NO_4. then what Is the formula of sodium glutamate, commonly known as MSG. or monosodium glutamate?

Explanation / Answer

6.

Systematic name of water: Dihydrogen monoxide.

Technically, water is an amphoteric substance: it can behave as an acid in the presence of a base and as a base in the presence of an acid.
When water is acting as an acid, it is sometimes (rarely!) called hydroxic acid. That's because the conjugate base of the acidic water molecule is the hydroxide ion.

7.

Thiosulfate ion:   S2O32-

8.

Monosodium glutamate: C5H8NO4Na

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