A student synthesized a coordination compound, Ni(NH3)nCl2, using the procedures given in the laboratory class. The student added 32.0 mL of 0.50 M HCl solution to an aqueous solution containing 0.2346 g of Ni(NH3)nCl2. The excess HCl required 25.60 mL of 0.1000 M NaOH solution for complete titration. How many moles of NH3 were present in the student's sample

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l