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A sample of hydrogen chlorine was dissolved in water to make 250 cm3 of solution 25 cm3 of the solution required

      

A sample of hydrogen chlorine was dissolved in water to make 250 cm3 of solution 25 cm3 of the solution required 46 cm3 of 11.0 M sodium hydroxide for complete neutralization
i) Calculate the number of moles of hydrochloric acid in 25 cm3 of solution
ii) Determine the mass of hydrogen chloride that was dissolved to make 250 cm3 of solution (Cl = 35.5, H = 1.0)

  

Answers


John
i) HCL(aq) + NaOH(aq) $\rightarrow$ NaCl(aq) + H2Ol

Moles of NaOH = Moles of HCL

= $\frac{46 \times 11}{1000}$ = 0.506 moles


ii) Moles of HCL in 250cm3 = 0.506 $\times$ 10 = 5.06

R.M.M of HCL = 1 + 35.5 = 36.5

Mass of HCL = 5.06 $\times$ 36.5

= 184.69g

johnmulu answered the question on February 9, 2017 at 09:23


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