6.0 of ammonium phosphate is dissolved into water to produce 300mL of solution.What are the concentr

题目

6.0 of ammonium phosphate is dissolved into water to produce 300mL of solution.What are the concentrations (in mol/L) of the ammonium ions and phosphate ions present?我是加拿大高中生.大概中文就是有6克(NH4)2PO4融化在300毫升水里,求nh4离子和po4离子的concentration.

答案

M[(NH4)3PO4] = 149 g/molm[(NH4)3PO4] = 6 gn[(NH4)3PO4] = m[(NH4)3PO4]/M[(NH4)3PO4] = 6 g/149 g/mol = 0.04 molV[(NH4)3PO4(ag)]=300 mL=0.3 L(NH4)3PO4 = 3NH4^+ + PO4^3-c(NH4^+) = n(NH4^+)/V[(NH4)3PO4(ag)...