Respuesta :
The masses of dimethylamine and dimethylammonium chloride do you need to prepare 8. 00 l of pH = 12. 00 buffer is 1448 gm.
What is a Buffer Solution ?
A buffer is an aqueous solution that can resist significant changes in pH levels upon the addition of small amount of acid or alkali.
dimethylamine (CH₃)₂NH and dimethylammonium chloride (CH₃)₂NH * HCl are mixed to prepare a buffer solution
The concentration of the components is given as 0.5M , Volume = 8L
no. of moles = CV = 0.5 * 8 =4 moles
4 moles of dimethylamine = mass/ Molecular weight
Molecular weight of dimethylamine = 45 gm
Therefore the mass of dimethylamine required = 45 * 4 = 180 gm
4 moles of dimethylammonium chloride = 362 gm
Therefore the mass of dimethylammonium chloride required = 362*4 = 1448 gm
Thus the masses of dimethylamine and dimethylammonium chloride do you need to prepare 8. 00 l of pH = 12. 00 buffer is 1448 gm.
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