102 Задачка по химии №010 24876

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

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

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

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

5. 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?
9) anode 10) cathode

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

7. What emulsifier should be used to form a direct emulsion?
16) hydrophilic - iron oxide 17) hydrophobic - graphite
Give a stabilization scheme.

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

18)
19)

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