Ans. (b) (4) 8 lassify the following errors as being (I) determinate-personal, (

Question

Ans. (b) (4) 8 lassify the following errors as being (I) determinate-personal, (2) determinate. instrumental, (3) determinate-method, (4) indeterminate-personal, (5) indeterminate instrumental, or (6) indeterminate-conditions: (a) End point and equivalence point do not coincide (b) Reading a burette as 15.63 instead of correct value of 15.65 (c) Reading a balance weight as 13.5692 instead of the correct weight of 13.6592 (d) Misestimation of equilibrium point of balance (e) Reading a burette as 15.63 instead of the correct value of 14.37 (D Use of uncalibrated pipette (g) Variation of humidity during weighing of a hygroscopic solid (h) Variation of temperature during a titration (6) Solubility of a precipitate in the precipitation medium (i) Using 1: 10 HCl instead of the correct 1: 1 HCI (k) Use of nitric acid in place of sulfuric acid (0) Failure to distinguish between two shades of orange (m) Overshooting an end point by 0.03 mL (n) Overshooting an end point by 10 drops (o) Variation of the equilibrium point of a balance during a weighing (p) Weighing a warm crucible (g) The 5-g weight does not weigh exactly 5.000 g

Explanation / Answer

(a) determinate - personal

(B) determinate - personal

(c) determinate - instrumental

(d) indeterminate - instrumental

(e)  indeterminate - personal

(f) determinate - instrumental

(g) indeterminate - conditions

(h) indeterminate - conditions

(i)  determinate - method

(j) determinate - personal

(K) determinate - personal

(l) indeterminate - personal

(m) determinate - personal

(n) indeterminate - personal

(o) indeterminate - instrumenta

(p) indeterminate - conditions

(q) determinate - instrumental

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