A more rigorous theory of $pH$

Conservation of matter condition

Exercise 4

    

Write the condition of conservation of matter for the following solutions:

a) Ammonia $0.1\; M$

$[NH_4^+]$ $ + $ $[NH_3]$ $ =$ $ 0.1\;\frac{mol}{L}$

b) Cyanhydric acid $0.27\; \frac{g}{L}$

$[HCN]$ $ +$ $ [CN^-]$ $ =$ $ 1.0\cdot 10^{-2}\;\frac{mol}{L}$

c) $46.33\;\%$ $(\rho=1.360\; \frac{g}{mL} )$ sulfuric acid

$[HSO_4^-]$ $ +$ $ [SO_4^{2-}] $ $= $ $6.425\;\frac{mol}{L}$

d) $12.08%$ $(\rho=1.110 \frac{g}{mL})$ potassium hydroxide

$[K^+]$ $= $ $2.390 \;\frac{mol}{L}$

e) $0,01\; M$ chlorhydric acid

$[Cl^-]$ $ =$ $ 0.01\; \frac{mol}{L}$