Question $4$

Not yet answered

Marked out of $8\mathrm{.}00$

From the table in Mac Berthouex and Brown $(2013)$ where the parameters for calculating acute and chronic toxicity values as function of water hardness can be found, the parameters for cadmium for the acute and chronic toxicity criteria are given as: $m_A=1\mathrm{.}0166,b_A=-3\mathrm{.}924,m_c=0\mathrm{.}7409$ and $b_c=-4\mathrm{.}719,$ where:

$C{F}_{CMC}=1\mathrm{.}136672-0\mathrm{.}41838ln($ hardness $)$

$C{F}_{CCC}=1\mathrm{.}101672-0\mathrm{.}41838ln($ hardness $)$

$q=m_{A}ln($ hardness $)+b_A$

$CMC=e^{q}C{F}_{CMC}$

$r=m_{c}ln($ hardness $)+b_c$

$CCC=e^{r}C{F}_{CCC}$

If the water hardness is $65\mathrm{.}4m\frac{g}{L}CaC{O}_3,$ calculate the freshwater conversion factors?

Rounded off to $5$ significant figures:

$C{F}_{CMC}=$

Based on the given information, how many significant figures should your answer for CFCMC have?

Rounded off to $5$ significant figures:

$C{F}_{ccc}=$

$$

Based on the given information, how many significant figures should your answer for $C{F}_{CMC}$ have?

$$