Solve the following problem related to the solubility equilibria of some metal hydroxides in aqueous solution. the solubility of cu(oh)2(s) is 1.72 x10–6 g/100. ml of solution at 25° c.(i) write the balanced chemical equation for the dissociation of cu(oh)2(s) in aqueous solution. cu(oh)2 < ===> cu 2+ + 2 oh –(ii) calculate the solubility (in mol/l) of cu(oh)2 at 25 °c.(1.72 x10–6 g/0.100 l)(1 mol/97.5 g) = 1.76 x10–7 mol/l(iii) calculate the value of the solubility-product constant, ksp, for cu(oh)2 at 25 °c. ksp = [cu 2+][oh –]2 = [1.76 x10–7][3.53 x10–7]2 = 2.20 x10–20

What is the [oh-] in a solution with a poh of 3.90

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

Straightforward questions answered in the powerpoint slidesreaction: heating the starting materials under refluxwhat does it mean to heat under reflux? why do we choose water as the reflux solvent? what are boiling chips used for? why do we put a condenser on top of the reaction? why do we add heat and let the reaction stir for 30 minutes? why do we add sulfuric acid to the reaction after it cools as opposed to when it’s still hot? separation: filtration of precipitatewhy don’t we do an aqueous and organic extraction in the separatory funnel? why do you rinse the salicylic acid on the filter with ice cold water? purification: recrystallization of salicylic acid (no hot filtration needed)what is the difference in the amount of room temperature water vs. boiling water needed to dissolve the salicylic acid (assume a 1.2 gram yield of salicylic acid)? remember, in the lab if you need x ml of boiling water to dissolve a solid, then you should add a little more (definitely no more than 1.5 times the theoretical amount) to ensure it doesn’t recrystallize prematurely. analysis: melting point of salicylic acidwhat can you conclude if the melting point of the salicylic acid you just synthesized is 152-155oc and the 1: 1 mix of your product and “synthetic” salicylic acid is 151-154oc?