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- Solutions of Cu (NO3)2, FeCl3, and CaCO3 of the same concentration are added to identical samples of silica sols with a positive charge of counterions. Which of the ions of these electrolytes will cause coagulation of the sol? What electrolyte is needed less?How do you estimate what concentrations of electrolyte will be required for a conductivity in the range of 300 - 2000 uS/cm?1. The following molar conductivity data are obtained for a strong electrolyte: Concentration (M) Am (S m² mol-¹) 0.001 0.01237 0.01 0.01185 0.1 0.01067 What would be the approximate conductivity of the electrolyte at infinite dilution? A) 0.915 S m² mol-¹ B) 125 S m² mol-¹ C) 511 S m² mol"¹ D) 0.0125 S m² mol-¹ E) 0.243 S m² mol-¹
- What is equivalent conductivity?Variable electrovalency is shown by which block elements?A sample of mineral containing water as the onlyvolatile constituent contains 26.40% SiO2 and8.86% H2O. What is the corrected percentage of SiO2(%SiO2) in the material after sufficient heating to drive off allof the water?
- GRAVIMETRIC ANALYSIS The addition of dimethylglyoxime, H2C4H602N2, to a solution containing nickel(Il) ion gives rise to a precipitate: Nickel dimethylglyoxime is a bulky precipitate that is inconvenient to manipulate in amounts greater than 135 mg. The amount of nickel in a type of permanent-magnet alloy ranges between 22% and 38%. Calculate the sample size that should not be exceeded when analyzing these alloys for a nickel.The addition of dimethylglyoxime, H2C4H602N2, to a solution containing nickel(Il) ion gives rise to a precipitate: Nickel dimethylglyoxime is a bulky precipitate that is inconvenient to manipulate in amounts greater than 135 mg. The amount of nickel in a type of permanent-magnet alloy ranges between 22% and 38%. Calculate the sample size that should not be exceeded when analyzing these alloys for nickel.A Knudsen cell was used to determine the vapor pressure of Ge at 1000^(@)C. During an interval of 7200s, the mass loss through a hole of radius 0.50mm was 43ug. What is the vapor pressure of Ge ? (assume Ge gas to be monoatomic) Please answer fast i give you upvote.