Ionic solid `Na^(+) A^(-)` crystallise in rock salt type structure . 2.592 gm of ionic solid salt NaA dissolved in water to make 2 litre solution . The pH of this solution is 8. If distance between cation anion is 300 pm . Calculate the density of ionic solid (Pkw=13 Pka=13)
Ionic solid `Na^(+) A^(-)` crystallise in rock salt type structure . 2.592 gm of ionic solid salt NaA dissolved in water to make 2 litre solution . The pH of this solution is 8. If distance between cation anion is 300 pm . Calculate the density of ionic solid (Pkw=13 Pka=13)
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The density of Ionic solid B^(+)A^(-) (Crystallises in rock salt type) is 4g/cc and the value of face diagonal unit cell is 600sqrt2 pm. If 1.296 g of an ionic solid B^(+)A^(-) (Salt of W.B. + S.A.) dissolved in water to make one litre solution, then its pH is ("T = 298K, "K_(b)" for BOH is "10^(-4). N_(A) = 6 xx 10^(23))
Calculate the pH of the following solutions. a. 0.37g fo Ca(OH)_(2) dissolved in water to give 500 ml solution b. 0.3 g of NaOH dissolved in water to give 200 ml solution c. 0.1825% HCl aqueous solution d. 1 ml of 13.6 M HCl is diluted with water to give 1 litre solution.
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(i) A white solid A, on being strongly heated, leaves a residue which is yellow while hot and white hot and white when cold ii) The solid A, insoluble in water, dissolves in dilute HCI to give a solution B and a gas which does nor affect acidified dichromate paper but turns baryta water milky. iii) When H_(2)S is passed through the solution B, a white precipitate C is obtained iv) The precipitate C dissolves in dilute HCI to give a solution which, when treated with an NaOH solution, gives a white precipitate. The final precipitate dissolves in an excess of NaoH form a solution D. This alkaline solution, on acidification with acetic acid followed by treatment with H_(2)S , gives the precipitate C. The salt A is a
(i) A white solid A, on being strongly heated, leaves a residue which is yellow while hot and white hot and white when cold ii) The solid A, insoluble in water, dissolves in dilute HCI to give a solution B and a gas which does nor affect acidified dichromate paper but turns baryta water milky. iii) When H_(2)S is passed through the solution B, a white precipitate C is obtained iv) The precipitate C dissolves in dilute HCI to give a solution which, when treated with an NaOH solution, gives a white precipitate. The final precipitate dissolves in an excess of NaoH form a solution D. This alkaline solution, on acidification with acetic acid followed by treatment with H_(2)S , gives the precipitate C. The salt A is a
A
sulphite
B
carbonate
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sulphide
D
chloride
It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. The size of iso electronic species -F^(-) , Na^(+) and Mg^(2+) is effected by
It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. The size of iso electronic species -F^(-) , Na^(+) and Mg^(2+) is effected by
A
Nuclear charge
B
Valence principle quantum number (n)
C
Electron - Electron interation in the outer orbitals
D
None of these
Consider an ionic solid that dissolves in water according to the equation: M_nX_(m(s)) hArr nM^(m+) ""_((aq))+mX^(n-) ""_((aq)). the equilibrium constant for this reaction , K_(sp) =[M^(m+) ]^(n) [X^(n-) ]^(m) is known as the solubility product of M_n X_m .The form of this euquilibrium is important in understanding effects such as the indluence of pH , complex formation and common ion effects. Equilibrium constant in solutions should be written correctly using activities and not concentrations . The difference between these quantities is large in concentrated ionic solutions and K_(sp) is quantitatively reliable as a guide of solubilities only for very dilute solutions. if solubility product of AB type salt is 4xx 10 ^(-10) at 18^(@) C , and M.W. of AB is 143. 5 g/mol. If 3mg of the salt AB is mixed with one litre of water then _______
Consider an ionic solid that dissolves in water according to the equation: M_nX_(m(s)) hArr nM^(m+) ""_((aq))+mX^(n-) ""_((aq)). the equilibrium constant for this reaction , K_(sp) =[M^(m+) ]^(n) [X^(n-) ]^(m) is known as the solubility product of M_n X_m .The form of this euquilibrium is important in understanding effects such as the indluence of pH , complex formation and common ion effects. Equilibrium constant in solutions should be written correctly using activities and not concentrations . The difference between these quantities is large in concentrated ionic solutions and K_(sp) is quantitatively reliable as a guide of solubilities only for very dilute solutions. if solubility product of AB type salt is 4xx 10 ^(-10) at 18^(@) C , and M.W. of AB is 143. 5 g/mol. If 3mg of the salt AB is mixed with one litre of water then _______
A
all the solute settles down
B
unsaturated solution is formed
C
exactly saturated solution is formed without undissolved traces
D
a part of salt settles down
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Consider an ionic solid that dissolves in water according to the equation: M_nX_(m(s)) hArr nM^(m+) ""_((aq))+mX^(n-) ""_((aq)). the equilibrium constant for this reaction , K_(sp) =[M^(m+) ]^(n) [X^(n-) ]^(m) is known as the solubility product of M_n X_m .The form of this euquilibrium is important in understanding effects such as the indluence of pH , complex formation and common ion effects. Equilibrium constant in solutions should be written correctly using activities and not concentrations . The difference between these quantities is large in concentrated ionic solutions and K_(sp) is quantitatively reliable as a guide of solubilities only for very dilute solutions. if solubility product of AB type salt is 4xx 10 ^(-10) at 18^(@) C , and M.W. of AB is 143. 5 g/mol. If 3mg of the salt AB is mixed with one litre of water then _______
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Consider an ionic solid that dissolves in water according to the equation: M_(n)X_(m(s)) nM_(aq)^(m+)n + mX_(aq)^(n-) . The equilibrium constant for this reaction, K _(sp)=[M^(m+)]^(n) [X^(n-)]^(m) is known as the solubility product of M_(n), X_(m) . The form of this euquilibrium is important in understanding effects such as the influence of pH, complex fomation and common ion cffect. Equilibrium constant in solution should be written correctly using activities and not concentrations. The difference between thesc quantities is large in concentrated ionic solutions and K_(sp) is quantitatively reliable as a guide of solubilities only for very dilute solutions, If solubility product of AB type salt is 4xx 10^(-10) at 18^(@) C, and M.W of AB is 143.5 g/mol. If ppt. of AB is washed with 5 lit water, loss in wt. of ppt. of AB is
Consider an ionic solid that dissolves in water according to the equation: M_nX_(m(s)) hArr nM^(m+) ""_((aq))+mX^(n-) ""_((aq)). the equilibrium constant for this reaction , K_(sp) =[M^(m+) ]^(n) [X^(n-) ]^(m) is known as the solubility product of M_n X_m .The form of this euquilibrium is important in understanding effects such as the indluence of pH , complex formation and common ion effects. Equilibrium constant in solutions should be written correctly using activities and not concentrations . The difference between these quantities is large in concentrated ionic solutions and K_(sp) is quantitatively reliable as a guide of solubilities only for very dilute solutions. if solubility product of AB type salt is 4xx 10 ^(-10) at 18^(@) C , and M.W. of AB is 143. 5 g/mol. The solubility in g/lit of AB is