Question

PRINTER VERSION BACK NEX Practice Exercise 16.42 Sodium bicarbonate gives solutions that are slightly alkaline (approximately pH 8.3), and similar solutions of sodium hydroxide (lye) are very base with a pH around 12 or more. Lye will cause major damage, not death, if swallowed, while sodium bicarbonate is a common antacid. Calculate the ph of a 0.29 M sodium carbonate solution the tolerance is/-2 MINI Decide is an acceptable substitute for sodium bicarbonate. It is an acceptable substitute for sodium bicarbonate • It is not an acceptable substitute for sodium bicarbonate.

Answer 1

is 2.1X164 (Taken from a Note: Ky value for o vou Na, cog (2Na+ cope) Boole I weak Bare & ky=214109 Corto - Incoj tout . r o - Inhally at Equehbe - lfcon loul MCO) 0.29 0.29-2 We know i nxn [core kbc 10.29-x) wekwow that that 02 0.29-n 2.1x18h - = 0 ( Not solvable) - 0.GIxion a+210104 & Taking appor 1x184 = 24 (acco.za * 184 = 22 % = 7:7x103) & toni] = 7.7X163 = poly = -1g 77 x 10 а оч Se poh e gil the ph of 0.29 m Na, og is much highe, De finetely 3/ph= 18-21 = 11.9. It can't be substitute in place of Natico , Na2CO3). Any way Nahog ack as Antacid while as Na, coz Used in washa fowa