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Calculate the pH of the following solutions:
0.3g of NaOH dissolved in water to give 200mL of solution.
0.3g of NaOH dissolved in water to give 200mL of solution.
Calculate $\Delta_\text{f}\text{H}^\circ$ of HCl if bond energy of H-H bond is 437kJ mol-1, Cl-Cl bond is 244kJ mol-1 and H-Cl is 433kJ mol-1.
→- 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 organometallic compound on analysis was found to contain, C = 64.4%, H = 5.5% and Fe= 29.9%. Determine its empirical formula (At. mass of Fe = 56u).
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Although geometries of NH3 and H2O molecules are distorted tetrahedral, bond angle in water is less than that of ammonia. Discuss.
A cell is constructed using $\frac{\text{Cu}^{2+}}{\text{Cu}}$ and $\frac{\text{Al}^{3+}}{\text{Al}}$ electrodes.
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$\text{E}^0_\frac{\text{Al}^{3+}}{\text{Ag}}=-1.66\text{V}$
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What is the energy in joules, required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state? The ground state electron energy is – 2.18 × 10-11 erg.
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→- Dissociation constant of conjugate base of HF, Ka = 6.8 × 10-4.
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(i) An atomic orbital has $n=3$. What are the possible values of $l$ and $m_l$ ?
(ii) List the quantum number ( $m_l$ and $l$ ) of electrons for $3 d$ orbital.
(iii) Which of the following orbitals are possible? $1 p, 2 s, 2 p$ and $3 f$
→(ii) List the quantum number ( $m_l$ and $l$ ) of electrons for $3 d$ orbital.
(iii) Which of the following orbitals are possible? $1 p, 2 s, 2 p$ and $3 f$