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A 0.205 g sample of CaCO3 (Mr = 100.1 g/mol) is added to a flask along with 7.50 mL of 2.00 M HCl. CaCO3(aq) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)Enough water is then added to make a 125.0 mL solution. A 10.00 mL aliquot of this solution is taken and titrated with 0.058 M NaOH. NaOH(aq) + HCl(aq) → H2O(l) + NaCl(aq)How many mL of NaOH are used?
how many grams of k2cr207are therein 8.90×1024 molecules of k2cr207
which of the following bonds is the most polar? a.H-C1 b.C-C1 c.H-H d.N-F
In an experiment to determine the transport number of Li+ using the moving boundary methods ,a student used a cell with a Cross sectional area of 0.125cm2 ,when a constant current of 1.8MA was passed for 24.8minutes ,the boundary formed between the two solutions moved a distance of 7.3cm towards the cathode .if 0.01M Licl solution was used as the lead solution, calculate the transport number of Li+ in this solution
In a moving boundary experiment 0.01M Hcl solution was treated on a lithium chloride solution. The tube used had a diameter of 1cm .when a current of 11.0milliametre was passed for 20minutes ,the H+ ions ,Li+ ions boundary moved through 13.9cm . calculate the transport number of H+ and Cl- ions in the Hcl solution
The molar conductance of sodium acetate ,Hcl and Nacl at infinite dilutions are 0.0091 ,0.425 and 0.01281 respectively . calculate the malor conductance of acetic acid at infinite dilutions
From the following molar conductivities at infinite dilutions
^°m for Ba(OH)2 = 457.6 ohm-1cm2mol-1
^°m for Bacl2= 240.6 ohm-1cm2mol-1
^°m for NH4cl = 129.8 ohm-1cm2mol-1
Calculate the ^°m of NH4cl
the uncertainty associated with a temperature calculated from two readings of a 0oC and 110oC thermometer is 1oC.calculate the percentage uncertainty associated with a temperature difference of 8.0oC. give your answer to 2 significant figures
In a hittorf experiment ,a student electrolyzed aqueous AgNO3 solution using silver electrodes . The amount of AgNO3 in the anode compartment before electrolysis was 0.228g and the amount after electrolysis was 0.282g. during electrolysis it was found that 0.019g of copper was deposited in the copper colorimeter connected in series with the hittorf cell. Calculate the transport number of Ag+
A solution of AgNO3 containing 12.14g of Ag in 50ml of solution was electrolyzed between pt electrodes . After electrolysis 50ml of the anode solution was found to contain 11.55g of Ag ,while 1.25g of metallic Ag was deposited on the cathode . calculate the transport number of Ag+
#339914 on Dec 2023