Consider the following precipitation reaction: 2Na3PO4(aq)+3CuCl2(aq)→Cu3(PO4)2(s) +6NaCl(aq)

What volume of 0.182 MNa3PO4 solution is necessary to completely react with 89.0 mL of 0.120 MCuCl2?

your answer would be “dry”

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.