Question
What is meant by reaction quotient? Give its expression.
✓
Answer
Reaction quotient: It is defined as product of molar concentration of products each raised to the power equal to their respective stoichiometric coefficients in balanced chemical equation divided by the product of molar concentration of the reactants raised to the power equal to their individual stoichiometric coffecients at any stage of reaction,
$\text{e.g.}\text{ aA}+\text{bB}\rightleftharpoons\text{cC}+\text{dD}$
$\text{Q}_{\text{c}}=\frac{[\text{C}^{\text{c}}][\text{D}]^{\text{d}}}{[\text{A}]^{\text{a}}[\text{B}]^{\text{b}}}$
$\text{e.g.}\text{ aA}+\text{bB}\rightleftharpoons\text{cC}+\text{dD}$
$\text{Q}_{\text{c}}=\frac{[\text{C}^{\text{c}}][\text{D}]^{\text{d}}}{[\text{A}]^{\text{a}}[\text{B}]^{\text{b}}}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Calculate the hydrogen ion concentration in the following biological fluids whose oH are given below :
(a) Human muscle fluid, 6.83
(b) Human stomach fluid, 1.2
(c) Human blood, 7.38
(d) Human saliva, 6.4.
(a) Human muscle fluid, 6.83
(b) Human stomach fluid, 1.2
(c) Human blood, 7.38
(d) Human saliva, 6.4.
Match standard free energy of the reaction with the corresponding equilibrium constant.
→| Column I | Column II | ||
| i. | $\Delta\text{G}^\ominus>0$ | a. | $\text{K}>1$ |
| ii. | $\Delta\text{G}^\ominus<0$ | b. | $\text{K}=1$ |
| iii. | $\Delta\text{G}^\ominus=0$ | c. | $\text{K}=0$ |
|
|
| d. | $\text{K}<1$ |
Justify the following statements.
→- Reactions with $\Delta\text{G}<0$ always have an equilibrium constant greater than 1.
- Many thermodynamically feasible reactions do not occur under ordinary conditions.
- At low temperatures, enthalpy change dominates the $\Delta\text{G}$ expression and at high temperatures, it is the entropy which dominates the value of $\Delta\text{G}.$
Although heat is a path function but heat absorbed by the system under certain specific conditions is independent of path. What are those conditions? Explain.
How many grams of Cl2, are required to completely react with 0.4g of H, to yield HCl? Also, calculate the amount of HCl formed.
- Give the relationship between Ka, c and $('\alpha')$ where 'Ka' is acid dissociation constant, 'c’ is molar concentration, $'\alpha'$ is degree of dissociation.
- If the solubility of Ca(IO3)2 in water at 18°C is 2.1g/ litre. Calculate the value of solubility product.
[Molecular mass of Ca(IO3)2 = 390]
An ion with mass number 37 possess one unit of negative charge. If the ion contains $11.1 \%$ more neutrons than the electrons, find the symbol of the ion.
→For the following bond cleavages, use curved-arrows to show the electron flow and classify each as homolysis or heterolysis. Identify reactive intermediate produced as free radical, carbocation and carbanion.
Calculate the lattice enthalpy of MgBr2, given that
Enthalpy of formation of MgBr2 = -524kJ mol-1
Sublimation energy of Mg = 148kJ mol-1
Ionization energy of Mg = 2187kJ mol-1
Vaporisation energy of Br2(l) = 31kJ mol-1
Dissociation energy of Br2(g) = 193kJ mol-1
Electron gain enthalpy of Br2(g) = 331kJ mol-1
Enthalpy of formation of MgBr2 = -524kJ mol-1
Sublimation energy of Mg = 148kJ mol-1
Ionization energy of Mg = 2187kJ mol-1
Vaporisation energy of Br2(l) = 31kJ mol-1
Dissociation energy of Br2(g) = 193kJ mol-1
Electron gain enthalpy of Br2(g) = 331kJ mol-1
Calculate:
- Mass in grams of 5.8mol of N2O.
- Number of moles in 8.0g of O2.
- Molar mass of 11.2L at STP weighs 8.5g.