question archive Question1) Select ALL of the following compounds that could act as a base in solution

Question1) Select ALL of the following compounds that could act as a base in solution

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Question1) Select ALL of the following compounds that could act as a base in solution.

Question 1 options:

  • H3PO4
  • NH3
  • CO2
  • NaOH
  • CH3OH
  • N2
  • HSO3-
  • HCO32-

 

Question 2:

 Which of the following reactions most clearly demonstrates that the substance is a modified Arrhenius base?

Select only 1 reaction.

  • Al3+(aq) + 7 H2O(l) ? [Al(H2O)5(OH)]2+(aq) + H3O+(aq)
  • NaOH(aq) + HOCl(aq) ? NaOCl(aq) + H2O(l)
  • H3O+(aq) + OH-(aq) ? 2 H2O(l)
  • Na2S(s) + H2O(l) ? 2 Na+(aq) + HS-(aq) + OH-(aq)

 

Question 3:

 Nitric acid has excellent electrical conductivity as a result of its

  • inability to dissociate into ions
  • complete ionization in aqueous solution
  • partial ionization in aqueous solution
  • complete dissociation in aqueous solution

 

Question 4:

 A reaction between magnesium hydroxide and hydrochloric acid is defined as a neutralization reaction because the acid, HCl(aq):

  • donates hydrogen ions to the base, magnesium hydroxide 
  • is neutralized to form the base, magnesium hydroxide 
  • receives hydrogen ions from the base, magnesium hydroxide
  • reacts with the base, magnesium chloride

 

Question 5:

 Which of the following can act as a polyprotic base?

  • K2CO3
  • KOH
  • NaOH
  • NaCH3COO

 

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Question 1.

  • NH3 - weak base
  • NaOH - strong base
  • CH3OH - weak base
  • HSO3-- conjugate base
  • HCO32- - conjugate base

 

Question 2.

  • Na2S(s) + H2O(l) ? 2 Na+(aq) + HS-(aq) + OH-(aq)

Arrhenius base dissociates in water to give hydroxide ions. It increases the hydroxide ions of the solution

 

Question 3.

Complete dissociation in acqueus solution.

When nitric acid is added to water, it dissociate into different ions ( H3O+) and (NO2-). The ions are mobile and conduct electricity to differently charged electrodes.

 

Question 4.

The acid HCl donates hydrogen ions to the base, magnesium hydroxide.

A neutralisation reaction takes place when an acid reacts with a base. Magnesium hydroxide acts as the base by accepting protons from the acidic HCl thus making the reaction neutralisation.

 

 

Question 5.

K2CO3 is the polyprotic base.

It dissociate in solution to give CO32- anion.

The anion has a charge of -2 and thus can hold 2 protons donated by an acid making it polyprotic.com

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