The solubility product of Mg(OH)2 is 1.2 × 10-11. What minimum OH^- concentration must be attained (for example, by adding NaOH) to decrease the Mg^2+ concentration in a solution of Mg(NO3)2 to less than 1.0 × 10-3 M FeSO4.

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explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.