102. Solving a chemistry problem

TICKET No. 5
1. Which compound has greater surface activity:
1) CH3 (CH2)6 SO3Na 2) CH3 (CH2) SO3Na ?

2. What adsorbent should be used to extract water from oil?
3) hydrophilic - silica gel 4) hydrophobic - carbon black

3. What ions are adsorbed from a Ba(OH)2 solution by an ion exchanger having the composition
(RCOO-)n nNa ?
5) Ba2 6) OH-

4. Which protein will be adsorbed if a buffer solution (pH = 5.0) containing proteins is passed through a column with an anion exchanger:
7) albumin (pI=4.64); 8) γ-globulin (pI=6.4)?

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):
Ca(NO3)2(excess) (NH4)2CO3 = CaCO3(s) 2NH4NO3?
9) anode 10) cathode

6. What charge sign does the colloidal particle have if the coagulation thresholds are known (mmol/l):
KCl - 80.0; BaCl2 - 10.0; AlCl3 - 0.04?
11) positive 12) negative


7. What emulsifier should be used to form a direct emulsion?
13) hydrophobic - cholesterol 14) hydrophilic - dextrin
Give a stabilization scheme.

8. Which amino acid has a greater coefficient of movement speed on chromatographic paper:
15) 16)