Question

in a reaction 5.3 g of sodium carbonate reacted with 6 g of acetic acid. the products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. show what these observations ae in agreement with the law of conversation of mass.
sodium carbonate + acetic acid → sodium acetate + carbon dioxide + water​

Answer 1

Explanation :-

We have :-

→ Mass of Sodium Carbonate = 5.3 g

→ Mass of acetic acid = 6 g

→ Mass of Carbon dioxide = 2.2 g

→ Mass of water = 0.9 g

→ Mass of Sodium Acetate = 8.2 g

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Na₂CO₃ + 2CH₃COOH → 2CH₃COONa + CO₂ + H₂O

Here, in this equation :-

• Sodium Carbonate (Na₂CO₃) and acetic acid (CH₃COOH) are reactants .

• Sodium Acetate (CH₃COONa), Carbon dioxide (CO₂) and water (H₂O) are products.

______________________________

According to "Law of Conservation of Mass", mass of reactants and products should be same.

⇒ (5.3 + 6) g = (2.2 + 0.9 + 8.2) g

⇒ 11.3 g = 11.3 g

⇒ Mass of reactants = Mass of products

Hence, these observations are in agreement with "Law of Conservation of Mass" .

Answer 2

G I V E N :

In a reaction 5.3 g of sodium carbonate reacted with 6 g of acetic acid. the products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. show what these observations are in agreement with the law of conversation of mass.

sodium carbonate + acetic acid → sodium acetate + carbon dioxide + water

S O L U T I O N :

LHS :

For the product side ⤵

Here, we are provided with three substances :

Carbon Dioxide, Water and Sodium acetate

Weight of Carbon Dioxide = 2.2 g

Weight of Water = 0.9 g

Weight of Sodium aceate = 8.2 g

Total = Weight of all the substances

Total = 2.2 g + 0.9 g + 8.2 g

Total = 11.3 g

RHS :

First for the reactant side ⤵

Here, we are given with two substances :

Sodium carbonate and acetic acid

Weight of acetic acid = 6 g

Weight of sodium carbonate = 5.3 g

Total = Weight of Sodium carbonate + Weight of Acetic acid

Total = 5.3 g + 6 g

Total = 11.3 g

LHS = RHS

Hence, Proved that these observations are in agreement with the law of conversation of mass !!

[Note : According to Law Of Conservation Of Mass, Matter can neither be created nor be destroyed but can be transformed from one form to another]

E X T R A S :

Chemical reaction : It is the process of breaking the chemical bonds of the reacting substances(reactants) and making new bonds to form new substances(products).

Chemical Bond : A chemical bond is the force that holds the atoms of a molecule together, as in a compound.

Chemical Change : A chemical change is a permanent change in which the chemical composition of a substance is changed and one or more new substances with different chemical composition and different properties are formed.

When does a Chemical Change take place ?

A chemical change or a chemical reaction occurs when particles collide. Collisions occur when reactants are in close contact or by supply of energy. Thus, one or more of the following conditions are necessary for a chemical change.

Conditions Necessary for a Chemical Change ⤵

I) Mixing(Close Contact)

II) Solution

III) Heat

IV) Light

V) Electricity

VI) Pressure

VII) Catalyst