Tag: chemical from common salt

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Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

The pair whose both species are used in antacid medicinal preparation is

  1. $NaHCO _3$ and $Mg(OH) _2 $
  2. $Na _2CO _3$ and $Ca(HCO _3) _2 $
  3. $Ca(HCO _3) _2$ and $Mg(OH) _2 $
  4. $Ca(OH) _2$ and $NaHCO _3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Milk of magnesia is an aqueous suspension of magnesium hydroxide $[Mg(OH) _2]$ used to treat acid indigestion.
Also sodium bicarbonate is used for antacid medicinal preparation.

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

When we add a pinch of sodium hydrogen carbonate in a flask containing ethanoic acid a reaction takes place. What will be the observation when we carry out the reaction?

  1. Milky solution

  2. Bubble formation

  3. Solution turns red

  4. Brisk effervescence
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Two main observations during the reaction are:
(i) Brisk effervescence
(ii) Sodium acetate is formed

Chemical equation for the reaction is:

$2CH _3COOH + 2NaHCO _3 \to 2CH _3COONa + 2CO _2 + 2H _2O$


Option D is correct.
Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

'Sodium bicarbonate solution has $pH$ less than 7.'
State True or False:

  1. True

  2. False

  3. Cannot be determined

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sodium bicarbonate is amphoteric, reacting with acids and bases. It reacts violently with acids, releasing CO2 gas as a reaction product. Because of $NaHCO _3$ is a weak base the pH value should be greater than 7.

Reaction with sulfuric acid: 
$2 NaHCO _3 + H _2SO _4 \rightarrow Na _2SO _4 + 2 H _2O + 2 CO _2$ 

With sodium hydroxide: 
$NaHCO _3 + NaOH \rightarrow Na _2CO _3 + H _2O$

Hence, statement is false.

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

$NaHCO _3$ represent the formula of which one of the following? 

  1. Sodium carbonate

  2. Baking soda

  3. Sodium acetate

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

${ NaHCO } _{ 3 }$ is sodium bicarbonate or known as sodium hydrogen carbonate. Sodium bicarbonate is a white solid that appears as fine powder. It has a slightly salty, alkaline taste resembling that of sodium carbonate(washing soda). It is also known as baking soda or cooking soda. 

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

The balanced equations for : "Carbon dioxide is passed through a concentrated aqueous solution of sodium chloride saturated with ammonia".

  1. $NaCl + NH _4OH + CO _2\rightarrow NH _4Cl +NaHCO _3$
  2. $2NaCl + NH _4OH + CO _2\rightarrow NH _4Cl +2NaHCO _3$
  3. $NaCl + NH _4OH + CO _2\rightarrow NH _4CO +NaHCl _3$
  4. $NaCl + NH _4OH + CO _2\rightarrow NH _3 +NaCl+H _2CO _3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$NaCl + NH _4OH + CO _2\rightarrow NH _4Cl +NaHCO _3$ 

Sodium bicarbonate is formed. This reaction is used in the Solvay process for the manufacture of sodium carbonate.

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

Baking powder contains baking soda and : 

  1. potassium hydrogen tartarate

  2. calcium bicarbonate

  3. sodium carbonate

  4. vinegar
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Baking powder is dry chemical leavening agent a mixture of carbonate or bicarbonate and a weak acid. A typical acid in such formulations is cream of tartar derivative of tartaric acid. Commercially it is sodium bicarbonate.

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

Sodium sesquicarbonate is 

  1. $\displaystyle Na _{2}CO _{3}NaHCO _{3}$

  2. a double salt

  3. trisodium hydrogen discrabonate

  4. water softner
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation
Sodium sesquicarbonate (Systematic name trisodium hydrogendicarbonate) $Na _3H(CO _3) _2$ is a double salt of sodium bicarbonate and sodium carbonate($\displaystyle Na _{2}CO _{3}NaHCO _{3}$), and has a needle-like crystal structure. However, the term is also applied to an equimolar mixture of those two salts, with whatever water of hydration the sodium carbonate includes, supplied as a powder.
odium sesquicarbonate is used in bath salts, swimming pools, as an alkalinity source for water treatment.
Hence options A,B,C & D are correct.
Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

The element which is not common between the compounds called baking soda and soda ash is:

  1. nitrogen

  2. hydrogen

  3. oxygen

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

Baking soda formula is $NaHCO _3$.

Soda ash formula is $Na _2CO _3$.
So, hydrogen atom $(H)$ is not common between the compounds of baking soda and soda ash.
So, the answer is $B$.