pls answer number 2 II. Solve the following problems:1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2MNa,SO,?2. A carbonate buffer of pH 10 is needed by a chemist. How many grams ofNa,CO, is needed to dissolve in 1.5L of 0.2M NaHCO, to make the buffer? K.-11of HCO,= 4.7 x 10"3. What weight of Na,HPO, and H,PO, would be required to prepare 200mL ofa buffer solution of pH 7.40 that has an ionic strength of 0.2? pk = 7.124. How many mL of 2.0M boric acid solution must be added to 600mL of a0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24

Given, For H2CO3 , ka=4.7×10^-11 1.5L of 0.2M NaHCO3,PH=10 Na2CO3 molecular weight =106 Calculate…

Answered: 2. A carbonate buffer of pH 10 is…

2. A carbonate buffer of pH 10 is needed by a chemist. How many grams of Na,CO, is needed to dissolve in 1.5L of 0.2M NaHCO, to make the buffer? K of HCO, = 4.7 x 10" -11

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter11: Solving Equilibrium Problems For Complex Systems

Section: Chapter Questions

Problem 11.16QAP

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Concept explainers

Ionic Equilibrium

Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.

Arrhenius Acid

Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.

Bronsted Lowry Base In Inorganic Chemistry

Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.

Question

pls answer number 2

II. Solve the following problems:
1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2M
Na,SO,?
2. A carbonate buffer of pH 10 is needed by a chemist. How many grams of
Na,CO, is needed to dissolve in 1.5L of 0.2M NaHCO, to make the buffer? K.
-11
of HCO,
= 4.7 x 10"
3. What weight of Na,HPO, and H,PO, would be required to prepare 200mL of
a buffer solution of pH 7.40 that has an ionic strength of 0.2? pk = 7.12
4. How many mL of 2.0M boric acid solution must be added to 600mL of a
0.01M sodium borate in order for the pH to be 9.45? pk of H,BO, = 9.24

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