What is common ion effect?
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What are isoelectronic ions? Account for the decrease in size of following species oxide ion > Fluoride ion > sodium ion > magnesium ion.
The ions having same number of electrons are called isoelectronic ions. The above order is due to increasing order of effective nuclear charge.
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The concentration of hydrogen ion in a sample of soft drink is 3.8 × 10–3M. What is its pH?
pH = – log[3.8 × 10–3 ] = – {log[3.8] + log[10–3 ]} = – {(0.58) + (– 3.0)} = – {– 2.42} = 2.42 Therefore, the pH of the soft drink is 2.42...
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Explain the following: (i) Common ion effect (ii) Solubility products (iii) pH
(i) Suppression of ionization of weak electrolyte by adding a strong electrolyte having an ion common. (ii) Product of the molar concentrations of the ions in a saturated solution, each concentration...
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Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below:
(a) Human muscle fluid 6.83: pH = 6.83 pH = – log [H+] 6.83 = – log [H+] [H+] =1.48 × 10–7 M (b) Human stomach fluid, 1.2: pH =1.2 1.2 = – log [H+] [H+]...
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A mixture of sulphur and carbon disulphide is (a) heterogeneous and shows Tyndall effect (b) homogeneous and shows Tyndall effect
(d) homogeneous and does not show Tyndall effect
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In a complex ion [Co(NH3)5NO2]Cl2, (i) Identify the ligand. (ii) Oxidation number of metal ion.
(i) NH3, NO2. (ii) + 3
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Name two electric devices for each where (i) heating effect of current is used and (ii) magnetic effect of current is used.
Heating effect – Geyser, room heater. Magnetic effect – Electric bell, Cranes to lift magnetic material
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The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder
It is of which chapter
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The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder
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Ionization energy of a hydrogen-like ion A is greater than that of another hydrogen-like ion B.
The correct answer is (b) uA > uB
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