A scale removal1. Calculate the molar volume of a perfect gas at 20 Cand P= 1 bar. R-8.314 JK" mol".2- 200 ml of HCI (g) gas hydrogen chloride are dissolved in a volume V = 50 ml of water.a) Write the equation of the dissociation reaction of this acid in waterb) Calculate the concentration of HCl in water and deduce the PH of the obtainedsolution.3. Sodium hydroxide is used as descaling agent, a Sodium hydroxide solution is preparedby dissolving 10 grams in 500 ml of water, a Si solution is obtained. In order tocalculate the concentration of S1, 20 ml of S; are titrated by the hydrochloric aalready prepared. Equivalence is obtained after adding a volume Veq = 225 ml ofhydrochloric acid.a) Write the equation for the titration reaction.b) Determine the concentration of S. Calculate the mass of NaOH in S;c) Deduce the mass percentage of NaOH.4- Find the relation between PH and the volume of acid added at each instant ofter andbefore the equivalence.5- Complete the following table:|Va (ml)| 225103040PH6- Trace the shape of the curve PH = f(Va).scale: X-axis: 1 cm = 4 mly axis: 1 cm =1 PH unit

For ideal (perfect) gas : PV= nRT P = pressure = 1 bar = 105 Pa V = volume(m3) T = temperature =…

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A scale removal 1- Calculate the molar volume of a perfect gas at 20 Cand P = 1 bar. R-8.314 JK' mot.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

A scale removal
1. Calculate the molar volume of a perfect gas at 20 Cand P= 1 bar. R-8.314 JK" mol".
2- 200 ml of HCI (g) gas hydrogen chloride are dissolved in a volume V = 50 ml of water.
a) Write the equation of the dissociation reaction of this acid in water
b) Calculate the concentration of HCl in water and deduce the PH of the obtained
solution.
3. Sodium hydroxide is used as descaling agent, a Sodium hydroxide solution is prepared
by dissolving 10 grams in 500 ml of water, a Si solution is obtained. In order to
calculate the concentration of S1, 20 ml of S; are titrated by the hydrochloric a
already prepared. Equivalence is obtained after adding a volume Veq = 225 ml of
hydrochloric acid.
a) Write the equation for the titration reaction.
b) Determine the concentration of S. Calculate the mass of NaOH in S;
c) Deduce the mass percentage of NaOH.
4- Find the relation between PH and the volume of acid added at each instant ofter and
before the equivalence.
5- Complete the following table:
|Va (ml)
| 225
10
30
40
PH
6- Trace the shape of the curve PH = f(Va).
scale: X-axis: 1 cm = 4 ml
y axis: 1 cm =1 PH unit

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