Explanation

A buffer solution contains a weak acid and its conjugate base. The two species shall have a similar concentration in the solution. It”s also possible for a weak base and its conjugate acid to form a buffer solution.

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The KF solution already contains large number of ions. The objective is to thus find its conjugate acid or base.

contains no proton

and is unlikely to be a conjugate acid. Assuming that is a conjugate base. Adding one proton to would produce its conjugate acid.

Therefore is the conjugate acid of . happens to be a weak acid. As a result, combining with would produce a solution with large number of both the weak acid and its conjugate base, which is a buffer solution by definition.

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– lead + phosphoric acid = hydrogen + lead(ii) phosphate

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in cartography, a contour line (often just called a “contour”) joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

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