Calculate the mass of water in which 1.00 g of MgSO4.7H20 should be dissolved so that the resulting solution will be 20.0% MgSO4 and 80.0% water by mass. (MgSO4•7H20 consists of 51.17% H20 and 48.83% MgSO4 by mass)

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.

the ratio of the conjugate base to the acid required to attain the desired ph.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l