102. Solving a chemistry problem

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• Which compound has greater surface activity:
• heptylammonium chloride CH3 (CH2)6 NH3Cl;
• butylammonium chloride CH3 (CH2)3 NH3Cl?

• What type of adsorptive agents (adsorbates) in water are alcohols:
• surface-inactive; 4) surfactant.

• What ions are adsorbed from a BaCl2 solution by an ion exchange resin having the composition (RCOO-)n nH?
• Ba2 6) Cl-

• Which protein will be adsorbed if a buffer solution (pH = 4.5) containing proteins is passed through a column with an anion exchanger:
• pepsin (pI=2.0); 8) β-globulin (pI=5.9)?

• To which electrode will the colloidal particles of the sol obtained by the reaction move during electrophoresis (write the formula of the sol micelles):

KMnO4(excess) 3H2O2 = 2MnO2(s) 2KOH 2H2O 3O2?

• anode 10) cathode

• Which electrolyte will have the lowest coagulation threshold for a sol whose particles are negatively charged:
• Na3PO4; 12) AlCl3; 13) K4 [Fe(CN6]; 14) MgCrO4; 15) Cu(NO3)2?

• What emulsifier should be used to form a direct emulsion?
• hydrophilic - iron oxide 17) hydrophobic - graphite

Give a stabilization scheme.

• Which amino acid has a greater coefficient of movement speed on chromatographic paper:

18)

19)

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