Chemistry

Kindly consider the following figure

Mixture of acetone and chloroform shows negative deviation from Raoult's law because of hydrogen bonding

$t_{99.9}=\frac{2.303}{k}\log ?\frac{100}{100-99.9}=3*\frac{2.303}{k}$

$t_{50}=\frac{0.693}{k}$

$\frac{t_{99.9}}{t_{50}}=\frac{3*2.303*k}{k*0.693}=\frac{9}{96}\approx 10$

Optimum pH range for enzymatic activity is 5 to 7

Kindly consider the following figure

$pH=12,pOH=14-12=2$

$\left. [O{H}^{-}\right]={10}^{-2}$

$K_{sp}=\left. [C{a}^{2+}\right]{\left. [O{H}^{-}\right]}^2=\frac{\left({10}^{-2}\right)}{2}{\left({10}^{-2}\right)}^2=0.5*{10}^{-6}$

$K_{sp}=5*{10}^{-7}$

  $2Cl\left(g\right)\to C{l}_2\left(g\right)$ is exothermic process so $?H<0$ $$

$?n_g<0so,?S<0$

$Ca{H}_2+2H_{2}O\to Ca{\left(OH\right)}_2+2H_2\left(g\right)$

(Hydrolith)

Ellingham diagram explains the feasibility of reduction process not the kinetics of process.

$CaC{O}_3\left(s\right)\to CaO\left(s\right)+C{O}_2\left(g\right)$

1 mol 1 mol

100 g 22.4 L at STP

Volume of ${}_{}$ $C{O}_2$ obtained $=22.4*\frac{25}{100}=5.6L$ $\frac{}{}$ at STP