Assume that you are given a solution of an unknown acid or base. how can you tell whether the unknown substance is acidic or basic?

You would do a Ph test and if you were to use the regular materials for a Ph test then the color on your paper would decide if it were acidic or basic, if the color were to be red-ish then it would be an acid, if it were blue-ish then it would be a base

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Explanation:

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

answerspecific gravity;