Tag: salts and their classification

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Multiple choice salts salts and their classification acids, bases and salts chemistry

Ashish mixed a solution of soluble silver nitrate and soluble sodium chloride. The products formed are :

  1. soluble silver chloride and soluble sodium nitrate

  2. insoluble silver chloride and insoluble sodium nitrate

  3. insoluble silver chloride and soluble sodium nitrate

  4. soluble silver chloride and insoluble sodium nitrate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To make an insoluble salt, it is possible to make two soluble salts react together in a precipitation reaction. Silver nitrate and sodium chloride are both soluble. When mixing their solutions together, the result is insoluble silver chloride and soluble sodium nitrate.

Multiple choice salts salts and their classification acids, bases and salts chemistry

An insoluble salt can be made by mixing two solutions of soluble salts in a process is called :

  1. neutralization

  2. precipitation

  3. ionization

  4. condensation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An insoluble salt can be made by mixing two solutions of soluble salts in a process is called precipitation. Two solutions of soluble compounds can be used, each of which provides one of the two ions required to combine and precipitate out as the insoluble salt.

Multiple choice salts salts and their classification acids, bases and salts chemistry

Sodium hydroxide reacts with nitric acid to give a soluble salt which is _________.

  1. $NaNO$
  2. $NaNO _2$
  3. $NaNO _3$

  4. none of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$  Sodium\ hydroxide + Nitric\ acid \rightarrow Sodium\ nitrate + Water  $
$  NaOH(aq) + HNO _3(aq)  \rightarrow  NaNO _3(aq) + 2H _2O(l)   $
Sodium nitrate thus formed is a soluble salt.
 

Multiple choice salts salts and their classification acids, bases and salts chemistry

$  Zn + H _2SO _4 \rightarrow     $
What is the salt produced? What is the solubility of the salt?

  1. $ZnSO _4$, soluble
  2. $ZnSO _4$, insoluble
  3. $ZnSO _2$, soluble
  4. $ZnSO$, insoluble
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Reacting an acid with a metal or with an insoluble base gives a soluble salt. 
$  Zn + H _2SO _4 \rightarrow        ZnSO _4     +  H _2  $

Multiple choice salts salts and their classification acids, bases and salts chemistry

What additional factors affect the rate of dissolution of ionic solids like salts?

  1. Enthalpy and entropy

  2. Enthalpy and surface area

  3. Entropy and temperature

  4. Enthalpy and temperature
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Enthalpy and temperature affect the rate of dissolution of ionic solids like salts.
Positive value of enthalpy change indicates that the dissolution of ionic salt is endothermic. Increasing temperature will increase the dissolution of ionic solids like salts.

On the other hand,
negative value of enthalpy change indicates that the dissolution of ionic salt is exothermic. Increasing temperature will decrease the dissolution of ionic solids like salts.
Hence, option (D) is the correct answer.

Multiple choice salts salts and their classification acids, bases and salts chemistry

What are the products of the following reaction? 

$\displaystyle { H } _{ 2 }{ SO } _{ 4 }\left( aq \right) +{ Ba\left( OH \right)  } _{ 2 }\rightarrow $

  1. $\displaystyle { O } _{ 2 }$
  2. $\displaystyle Ba{ SO } _{ 4 }$
  3. $\displaystyle { O } _{ 2 }$ and $\displaystyle Ba{ SO } _{ 4 }$
  4. $\displaystyle { H } _{ 2 }O$ and $\displaystyle Ba{ SO } _{ 4 }$

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The products of the  reaction between barium hydroxide and sulphuric acid are barium sulphate and water.
$\displaystyle { H } _{ 2 }{ SO } _{ 4 }\left( aq \right) +{ Ba\left( OH \right)  } _{ 2 }\rightarrow \displaystyle Ba{ SO } _{ 4 } + \displaystyle { H } _{ 2 }O    $
It is acid base neutralisation reaction to form salt and water.

Multiple choice salts salts and their classification acids, bases and salts chemistry

What is a titration curve?

  1. A graph of volume vs. pH for a titration.

  2. A graph of acid vs. base for a titration.

  3. A graph of acid vs. pH for a titration.

  4. A graph of volume vs. acid for a titration.

  5. A graph of base vs. pH for a titration.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A titration curve is a graph of volume of added base (or acid) vs. pH for a titration.

Multiple choice salts salts and their classification acids, bases and salts chemistry

What is titration?

  1. A technique used to analyze properties of solutions. It involves adding a titrant to the solution to be analyzed.

  2. A way to determine the concentration of an acid but not a base.

  3. A way to perform neutralization reactions.

  4. A way to determine the concentration of a base but not an acid.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Titration is a technique used to analyze properties of solutions (concentrations). It involves adding a titrant to the solution to be analyzed.
The process of adding one solution from the burette to another in the conical flask in order to complete the chemical reaction between the two solutions is known as titration. Of two solutions, one must be standard (of known concentration) and other must be of unknown strength.

Multiple choice salts salts and their classification acids, bases and salts chemistry

Among the following reactions, find the one which gives precipitation?

  1. $\displaystyle { Ag }^{ + }\left( aq \right) +{ Cl }^{ - }\rightarrow AgCl\left( s \right) $
  2. $\displaystyle { C } _{ 5 }{ H } _{ 12 }\left( s \right) +8{ O } _{ 2 }\left( g \right) \rightarrow 5{ CO } _{ 2 }\left( g \right) +6{ H } _{ 2 }O\left( l \right) $
  3. $\displaystyle { NH } _{ 3 }\left( s \right) +{ H } _{ 2 }O\left( s \right) \leftrightharpoons { NH } _{ 4 }^{ + }\left( s \right) +{ OH }^{ - }\left( s \right) $
  4. $\displaystyle H{ C } _{ 2 }{ H } _{ 3 }{ O } _{ 2 }\left( l \right) +{ OH }^{ - }\left( aq \right) \rightarrow { H } _{ 2 }O\left( l \right) +{ C } _{ 2 }{ H } _{ 3 }{ O } _{ 2 }^{ - }\left( aq \right) $
  5. $\displaystyle Ca{ CO } _{ 3 }\left( s \right) \rightarrow CaO\left( s \right) +Ca{ O } _{ 2 }\left( g \right) $
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$A.$ Precipitation reaction
A precipitate of $AgCl$ is formed.
$\displaystyle { Ag }^{ + }\left( aq \right) +{ Cl }^{ - }\rightarrow AgCl\left( s \right) $
$B.$ Combustion reaction
$C.$ Hydrolysis
$D.$ Acid-base neutralization-Acetic acid is neutralized by hydroxide base.
$E.$ Decomposition reaction

Multiple choice salts salts and their classification acids, bases and salts chemistry

How do you determine the concentration of the unknown substance from the titration data?

  1. $(cH^+)(VH^+) = (cOH^-)(VOH^-)$
  2. $(cH^+)(VH^+) / (cOH^-)(VOH^-) = 1$
  3. $(cH^+)(VH^+) / (cOH^-)(VOH^-) = -log\:( pH)$
  4. $-log (cH^+)(VH^+) = pH$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

You determine the concentration of the unknown substance from the titration data by using the following equation
$\displaystyle  (cH^+)(VH^+) = (cOH^-)(VOH^-)$
$\displaystyle  (cH^+)  $  represents hydrogen ion concentration or acid concentration.
$\displaystyle   (VH^+) $ represents volume of acid solution.
$\displaystyle   (cOH^-)  $  represents hydroxide ion concentration (or base solution concentration).
$\displaystyle   (VOH^-)$  represents volume of base solution.