102. Solving a chemistry problem

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TICKET No. 5

• Which compound has greater surface activity:
• CH3 (CH2)6 SO3Na 2) CH3 (CH2) SO3Na ?

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

• What ions are adsorbed from a Ba(OH)2 solution by an ion exchanger having the composition

(RCOO-)n nNa ?

• Ba2 6) OH-

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

• 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?

• anode 10) cathode

• 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?

• positive 12) negative

• What emulsifier should be used to form a direct emulsion?
• hydrophobic - cholesterol 14) hydrophilic - dextrin

Give a stabilization scheme.

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

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