Solid state!

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5.35 g of a salt ACl ( of weak base AOH) is dissolved in 250 ml of solution. The pH of the resultant solution was found to be 4.827. Find the ionic radius of A⁺ and Cl^- if ACl forms CsCl type crystals having density 2.2 g/cc. Given K_b(AOH) = 1.8 X 10^{-5. r⁺r^- = .731 for this unit cell.}

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