temp was every $15$ seconds

$($temp t$0=15,$ t$1=12,$ t$2=8$ t$3=6$ t$4=4$ t$5=4$ t$6=3$ t$7=3$ t$8=3$ t$9=3$ t$10=2$ t$11=1$ t$12=1$ t$13=1$ t$14=0$ t$15=0$ t$16=0$ t$17=0$ t$18=0$ t$19=0$ t$20=-1$ t$21=-1$ t$22=-1$ t$23=-1$ t$24=-1$ t$25=-1$ t$26=-2$ t$27=-2$ t$23=-2$ t$29=-2$ t$30=-2$ t$31=-2$ t$32=-3$ t$33=-3$ t$34=-3$ t$35=-3)$ Part B: Determine the freezing point of a sample of pure water.

b$1$: Make a cooling curve plot for the data obtained during part B$.$ Label the x and y axis

appropriately. As shown in Figure $1,$ fit a straight line to the data points where the liquid is

cooling and solvent is converting to solid. Attach this plot to your data sheets and turn in with

your lab report $($you may need to plot each set of data points separately and find where they

intersect, depending on the program$).$ To find the freezing point you need to find where these

two intersect, this done by taking the straight line plot $($y $=$ mx $+$ b$)$ setting one of the variables in

each equal to each other and solving, then reinsert for the other variable. Youtube search $$how

to find where $2$ lines intersect$$ for a demo.

b$2$: freezing point of the pure water $($Tf$,($solvent$))\_\_\_\_\_\_\_\_\_\backslash$deg C