Tag: salts

Questions Related to salts

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

salts salts and their classification acids, bases and salts chemistry

  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

Show answer
Correct Option: C
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.

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

salts salts and their classification acids, bases and salts chemistry

  1. neutralization

  2. precipitation

  3. ionization

  4. condensation

Show answer
Correct Option: B
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.

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

salts salts and their classification acids, bases and salts chemistry

  1. $NaNO$

  2. $NaNO _2$

  3. $NaNO _3$

  4. none of the above

Show answer
Correct Option: C
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.
 

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

salts salts and their classification acids, bases and salts chemistry

  1. $ZnSO _4$, soluble

  2. $ZnSO _4$, insoluble

  3. $ZnSO _2$, soluble

  4. $ZnSO$, insoluble

Show answer
Correct Option: A
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  $

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

salts salts and their classification acids, bases and salts chemistry

  1. Enthalpy and entropy

  2. Enthalpy and surface area

  3. Entropy and temperature

  4. Enthalpy and temperature

Show answer
Correct Option: D
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.

What are the products of the following reaction? 

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

salts salts and their classification acids, bases and salts chemistry

  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

Show answer
Correct Option: D
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.

What is a titration curve?

salts salts and their classification acids, bases and salts chemistry

  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.

Show answer
Correct Option: A
Explanation:

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

What is titration?

salts salts and their classification acids, bases and salts chemistry

  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.

Show answer
Correct Option: A
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.

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

salts salts and their classification acids, bases and salts chemistry

  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) $

Show answer
Correct Option: A
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

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

salts salts and their classification acids, bases and salts chemistry

  1. $(cH^+)(VH^+) = (cOH^-)(VOH^-)$

  2. $(cH^+)(VH^+) / (cOH^-)(VOH^-) = 1$

  3. $(cH^+)(VH^+) / (cOH^-)(VOH^-) = -log:( pH)$

  4. $-log (cH^+)(VH^+) = pH$

Show answer
Correct Option: A
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.