The washing process shown in Figure $1$ has been operating for an extended period of time and no

parameter is changing significantly over time. The washing process was set up to take the Raw Pigment

and remove as much of the undesired salt from the desired TiO$2$ as possible, so that the salt can be

disposed of in the Waste Water stream, leaving the valuable TiO$2$ in the Washed Products stream. If the

process is running with a yield of $85\%$ TiO$2$ and a selectivity of $7$ in Stream B$,$ then calculate the amount

of water leaving in the Waste Water Stream $($i$.$e$.$D$*$ Dw$)$ in kg$/$h to $7$ significant figures.

For this question, include: Given, Find, Assumptions, Analysis, and Conclusions. Also include full balances

using the General Balance Equation, where necessary.