(i) What mass of hydrogen peroixde will be present in 2 L of a 5 molar solution ? (ii) Caluclate the mass of oygen which will be liberated by the decomposition of 200 mL of this solution.

(i) What mass of hydrogen peroixde will be present in 2 L of a 5 molar

1.	(i) What mass of hydrogen peroixde will be present in 2 L of a 5 molar solution ? (ii) Caluclate the mass of oygen which will be liberated by the decomposition of 200 mL of this solution.
Answer» `"Molarity of solution"=("Mass of" H_(2)O_(2)//"Molar mass")/("Volume of solution in litres")` `(5 molL^(-1))=("Mass of" H_(2)O_(2)//(34g mol^(-1)))/(2L)` `"Mass of "H_(2)O_(2)=(5 mol L^(-1))xx(2L)xx(34gmol^(-1))=340g` Mass of oxygen `(O_(2))` liberated `"Mass of "H_(2)O_(2)(l) "in 200mL of solution"=(340g)/(2L)xx(0.2L)=34g` `underset(68g)2H_(2)O_(2)(l) to 2H_(2)O(l)+underset(32g)(O_(2)(g))` `"Mass of" O_(2)(g) "liberated by 68g of" H_(2)O_(2)=32g` `"Mass of" O_(2)(g) "liberated by 34g of" H_(2)O_(2)=16g`

Discussion

No Comment Found

Related InterviewSolutions

When temporary hard water containing `Mg(HCO_(3))_(2)` is boiled, the ppt. formed is ofA. `MgCO_(3)`B. `MgO`C. `Mg(OH)_(2)`D. None of these
Water is said to be permanently hard when it contains `:`A. Chloride and sulphates of `Mg` and `Ca`B. Bicarbonates of `Na` and `K`.C. Carbonates of `Na` and `K`D. Phosphate of `Na` and `K.`
Hydrogen gas is not liberated when the following metal is added to dil. `HCl :`A. `Mg`B. `Sn`C. `Ag`D. `Zn`
When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ions are are exchanged withA. `H^(+) ion`B. `Ca^(2+) ion`C. `SO_(4)^(2-) ion`D. `HO^(-) ion`
When zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions `(Na^(o+))` are exchanged withA. `OH^(-)` ionsB. `SO_(4)^(2-)`ionsC. `Ca^(2+)` ionsD. `H^(+)` ions
When zeolite, which is hydrated sodium aluminate silicate, is treated with hard water, the sodium ions are exchanged with:A. `Cl^(ɵ)`B. `SO_(4)^(ɵ)`C. `Ca^(2+)`D. `Mg^(2+)`
When zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions `(Na^(o+))` are exchanged withA. `H^(o+)` ionsB. `Ca^(2+)` ionsC. `SO_(4)^(2-)` ionsD. `overset(Theta)(O)H` ions
When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ions are exchanged withA. `H^(+)`B. `Ca^(+2)`C. `OH`D. `SO_(4)^(2-)`
One mole of calciium phosphide on reaction with excess water givesA. One mole of phospheneB. Two moles of phospheneC. Two moles of phospheneD. One mole of phosphene pentoxide
When zeolite, which is hydrated sodium aluminate silicate, is treated with hard water, the sodium ions are exchanged with:A. `H^(+)`ionsB. `Ca^(2+)` ionsC. `Mg^(2+)` ionsD. Both `Ca^(2+)` and `Mg^(2+)`

(i) What mass of hydrogen peroixde will be present in 2 L of a 5 molar solution ? (ii) Caluclate the mass of oygen which will be liberated by the decomposition of 200 mL of this solution.

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment