Question

Calculate the amount of 50percent H2S04 required to decompose 25g of Marble ​

Answer 1

Answer:

50 grams

Explanation:

H2SO4           +     CaCO3                     -----> CaSO4             +               H2O +

Sulfuric acid          Calcium Carbonate          Calcium Sulphate            Water

CO2

Carbon dioxide

For this question , we will calculate the moles and find mole ratio:

Mole ratio of      H2SO4            :   CaCO3          =              1:1

                    Sulphuric Acid          Calcium Carbonate

Moles of the CaCO3       -     Molar Mass (40+12+48=100)

= Mass/Molar Mass  =25/100

                                 =0.25 moles

Since mole ratio is 1:1 then moles of H2SO4 required will also be 0.25moles

This equation is for 100% H2SO4, hence moles of 50 % H2SO4 required is :   100 = 0.25

        50  = 0.25x100/50 =  0.5 moles (twice as much as needed)

Therefore mass required = moles x molar mass

                                          = 0.5 x 100 =50g

Therefore, the mass required of the 50% H2SO4 is 50 grams

Thank you

Answer 2

Answer:

see the attachment for the answer