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A solution of HCl is known to be 0.5622 N. When titrated against KOH, 45.22 ml of the acid neutralized 48.23 ml of the base. Calculate the N of the base.



 


What is the molality of para-dichlorobenzene in a solution prepared by dissolving 2.65g C6H4Cl2 in 50.0 mL of benzene (d=0.897g/mL)?

how many ml of soln are required to prepare 0.02 mol of 2.5m Nacl soln?


A 3.00 g sample of TNT (trinitrotoluene, C7H5N3O6) is placed 

in a bomb calorimeter with a heat capacity of 1.93 kJ/°C; the 

ΔHcomb of TNT is −3403.5 kJ/mol. If the initial temperature of 

the calorimeter is 19.8°C, what will be the final temperature of 

the calorimeter after the combustion reaction (assuming no heat 

is lost to the surroundings)


Calculate for the specific heat of 28.0 g of of mercury (Hg)

when 137 J of energy is involved when raised at an initial

temperature of 22.0°C to a final temperature of 57. 0C.


Derive an expression for the entrophy change for isothermal mixing of ideal gas

a. A solution of HCl is known to be 0.5622 N. When titrated against KOH, 45.22 ml of the acid neutralized 48.23 ml of the base. Calculate the N of the base.1.    A solution of HCl is known to be 0.5622 N. When titrated against KOH, 45.22 ml of the acid neutralized 48.23 ml of the base. Calculate the N of the base.



b. What is the N of the solution of KOH if 45.18 ml are required to neutralize 0.3000 g of pure oxalic acid dehydrate (H2C2O4°2H2O)?

 

Hint: N x ml = g/MW/no. of H+ or OH- or +cation x 1000 

where N x ml = no. of milliequivalent weight and g/MW/no. of H+ or OH- or +cation x 1000 = no. of milliequivalent weight


 


A 0.00453 L of sodium chloride solution was needed in a 560 mg sample that assayed


87.1% (w/w) Na2SO4. Calculate the molar concentration of sodium chloride in the


solution.

what are the electropositive atoms in complex disodium edetate reaction with Mg



What is the trend in ionic radius from potassium to sodium

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