What three types of attractive forces are involved in solution formation? Explai

Question

What three types of attractive forces are involved in solution formation? Explain why cations in aqueous solutions are attracted to the oxygens of water molecules and why anions are attached to the hydrogens of water molecules. Which of the following pairs of compounds would form a solution? C_20 H_12 and H_2 O C_5 H_12 and C_7 H_16 HCl and H_2 O CH_3 OH and H_2 O CO_2 and H_2 O CO_2 and C_7 H_16 CCl_4 and H_2 O CH_3 NH_2 and H_2 O Which of the following ionic compounds are water soluble? CsCl K_2 CO_3 MgSO_4 AgCl Ni(NO_3)_3 CuS Mn_3 (PO_4)_2 (NH_4)_2 Cr_2 O_7 U(NO_3)_3 (NH_4)_3 PO_4 Cr_2 S_3 CuCO_3 NaClO_4 FeCl_3 KC_2 H_3 O_2 NiSO_4 Al(OH)_3 NaOH

Explanation / Answer

Dipole-dipole forces operate between neutral, polar molecules

london dispersion forces operate between neutral, nonpolar molecule

ion-dipole foce operate between permanent ions and a polar solvent molecule

2.Cation has positive charge it attract the negative charge oxygen of water.

Anion has negative charge it attract the positive chrge of hydrogen of water.

3. C20H42 and water .-----> not form solution becuse of C20H42 is nonpolar and water is polar.

b. C5H12 and C7H16 ------> form a solution both are non polar

c. HCl and water ------------> form solution both are polar

d. CH3OH and water---------> form solution both are polar

e. Co2 and water ----------> form solution

f. Co2 and C7H16 -------> not form solution

g. CCl4 and H2O --------> not form solution CCl4 is non polar and H2O is polar

h. CH3NH2 and H2O -------> form solution both are polar

4. a CsCl is soluble in water

    b. K2Co3 is soluble in water

   c. MgSO4 is soluble in water

    d. AgCl is insoluble in water

   e. Ni(NO3)3 is soluble in water

     f. Cus is insoluble in water

g. Mn3(po4)2 is insoluble in water

h. (NH4)2Cr2O7 is soluble in water

i. U(NO3)3 is soluble in water

j. (NH4)3PO4 is soluble in water

k. Cr2S3 is insoluble in water

l. CuCo3 is insoluble in water

m. NaClO4 is soluble in water

n. fecl3 is soluble in water

o. Ch3COOk is soluble in water

p NiSo4 is insoluble in water

q. Al(OH)3 is insoluble in water

r. NaOh is soluble in water

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