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.

提问时间：2021-03-24

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)...