Calculate the masses of NaCl (58.44 g/mol) and KCl (74.55 g/mol) that are required to prepare...

Calculate the masses of NaCl (58.44 g/mol) and KCl (74.55 g/mol) that are required to prepare 500.00 mL of a standard solution that contains N a + Na+ and K + K+ present at 540.0 ppm w/v.

mass of NaCl ____

mass of KCl _____

please show work.

Solutions

Expert Solution

concentration of Na+ = 540 ppm = 540 mg / L

= 0.540 g/ L

Molar mass of NaCl = 58.44 g/mol

molar mass of Na+ = 22.99 g/mol

mass of NaCl required = (58.44 / 22.99 ) x 0.5

= 1.271 g NaCl

mass of NaCl =1.271 g

molar mass of KCl = 74.55 g/mol

molar mass of K+ = 39.09 g/mol

mass of KCl required = 74.55 / 39.09 ) x 0.50

= 0.954 g

mass of KCl = 0.954 g

queen_honey_blossom answered 1 year ago

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