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anyone want to try and explain these??
1) Normality of a Kpermanganate solution is 2.10. what is the molarity of the soln if in the course of the reaction the potassium permanganate is changed to manganese dioxide? answer is .7
i understand normality, and see that 2.10 is divided by 3, to get .7 but why 3?
2) If 3L of .5M NaCl is mixed with 9.0 L of .2777 M of NaCl what is the final concentration of the resulting soln? answer is .33M
3) How many grams of Al2(S04)3 are needed to make 87.5g of .3m Al2(SO4)3 soln? atomic weights of Al= 27, S=32, O=16
answer is (87.5 x 102.6)/1102.6
4) What is the mole fraction of C2H5OH in an aquesous soln that is simultaneously 3.86m C2H5OH and 2.14m CH3OH?
answer is 3.86/61.55
any help is GREATLY appreciated!! thanks!
1) Normality of a Kpermanganate solution is 2.10. what is the molarity of the soln if in the course of the reaction the potassium permanganate is changed to manganese dioxide? answer is .7
i understand normality, and see that 2.10 is divided by 3, to get .7 but why 3?
2) If 3L of .5M NaCl is mixed with 9.0 L of .2777 M of NaCl what is the final concentration of the resulting soln? answer is .33M
3) How many grams of Al2(S04)3 are needed to make 87.5g of .3m Al2(SO4)3 soln? atomic weights of Al= 27, S=32, O=16
answer is (87.5 x 102.6)/1102.6
4) What is the mole fraction of C2H5OH in an aquesous soln that is simultaneously 3.86m C2H5OH and 2.14m CH3OH?
answer is 3.86/61.55
any help is GREATLY appreciated!! thanks!