a) Carbonic acid (H,CO;) is a weak diprotic acid. Write expressions for Kj and K, of H,CO,. Note that you are not required to write dissociation reactions, but expressions, i.e. K,l =.... and K,2 = .. a. 2 b) Say whether each of the following solutions is acidic, basic or neutral. b. 2 i) 10 3 МОН ii) 10 * M H,O*
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- A 20-year-old student with a coffee addiction had an episode of extreme hyperventilation due to anxiousness for his upcoming final examinations. Upon clinical assessment, his blood result had a pH of 7.53, and the bicarbonate ion concentration was at 22 mmol/L. What is the molar concentration of the bicarbonate ion? What is the molar concentration of the carbonic acid in mmol/L?Polymers are not very soluble in water, but their solubility increases if they have charged groups. (a) Case in, a milk protein,contains many —COO⁻ groups on its side chains. How does the solubility of casein vary with pH? (b) Histones are proteins es-sential to the function of DNA. They are weakly basic due to the presence of side chains with —NH2 and =NH groups. How does the solubility of a histone vary with pH?At 25oC, a 100mL solution is found to contain 20% by mass acetic acid (CH3COOH). The density of the solution is 1.05g/cm3. If this solution is diluted further to form 700mL, what will be the A) [OH-], B) pH and C) % dissociation of the resulting acetic acid solution? CH3COOH -> H+ + CH3COO- (Kb = 5.56x10-10)
- TRIS (also known during medical use as THAM) is an organic compound used extensively in biochemistryand molecular biology as a component of buffer solutions, especially for solutions of nucleic acids. At 37oC,-7body temperature, its Kb value is 5.13 x 10 . What is the approximate ratio of acid to base at pH 7.4, the pH ofblood?A 250 cm3 volumetric flask contains exactly 200,0 cm3 of a 0,025 mol.dm3sulphuric acid solution. Thereafter ten (10) sodium hydroxide pellets, eachof mass 0,1 g are dropped into the flask. After the pellets have dissolvedcompletely, the flask is topped to the 250 cm3 mark with water and thecontents are thoroughly homogenised. Determine the pH of the resultingsolution.Rain with a pH below 5.6 is considered acid rain. The principal cause of acid rain is coal-burning electrical power plants (sulfurous and sulfuric acids are formed in the atmosphere from this). Any combustion reaction that produces high temperature can also produce acid rain (nitrous and nitric acid are produced in the atmosphere from this). Thus, automotive engines are also an important contributor to acid rain. Acid rain harms both living and nonliving things in a variety of ways. What solution/s can you propose to combat acid rain?
- Q3- The acid-dissociation constant for chlorous acid, HCIO,, at 25C is 1.0x10. Calcul the concentration of H+ if the initial concentration of acid is 0.100 M. d Q4- How many grams of sodium hydroxide (M.wi=58.5) can be added 0 2.5 liter of a solution mixture of 0.3M ammonia and 0.15M ammonium chloride without changi POH by more than lunit? Ky=1.8x 10°? wHow to write the methodology? I have a practical of the MEASUREMENT USING PH METER, I don't know how to write the methodology. Here is the introduction: A pH meter is an electronic device mainly used for qualitative measurement, for thedetermination of acid and the basic value of a solution. Generally, it measures thehydrogen ion concentration/activity [H+] in a solution. It is denoted as:pH = - log10 [H+]In a pure water solution, the concentration of [H+] and [OH-] ions, respectively, rangefrom 1.0 x 10-1 M to 1.0 x 10-14 M. When [H+] is equal to [OH-] as when pure waterdissociates, the hydrogen ion concentration of pure water is equal to 1.0 x 10-7 M orpH = 7.00, defined as a neutral solution at 25°C, to be of temperaturedependent/endothermic dissociation.[H+] = [OH-] = 1.0 x 10-7 MWhen an ionic or polar substance is dissolved in water, it may change the relativenumbers of H+ and OH-. The higher the pH number, the lower the hydrogen ion concentration, and vice versa. Solution with an…A chemist takes 8.579 mL of liquid acetic acid, CH₃COOH (molar mass: 60.052 g/mol) with 1.05 g/mL density and mix it with 12.305 g of solid sodium acetate, CH₃COONa (molar mass: 82.0343g/mol) and prepare an aqueous solution of 1.0 L by adding required amount of water. (Acidity constant of CH₃COOH is 1.8x10⁻⁵) a) What is the pH of such solution?b) What would the pH of the solution be if 0.020 mol NaOH added?c) What would the pH of the solution be if 0.15 mol NaOH added to the solution in a?d) What would the pH of the solution be if 0.17 mol NaOH added to the solution in a? e) What would the pH of the solution be if 0.020 mol HCl added to the solution in a? f) What would the pH of the solution be if 0.15 mol HCl added to the solution in a?g) What would the pH of the solution be if 0.17 mol HCl added to the solution in a?
- A chemist takes 8.579 mL of liquid acetic acid, CH₃COOH (molar mass: 60.052 g/mol) with 1.05 g/mL density and mix it with 12.305 g of solid sodium acetate, CH₃COONa (molar mass: 82.0343g/mol) and prepare an aqueous solution of 1.0 L by adding required amount of water. (Acidity constant of CH₃COOH is 1.8x10⁻⁵) a) What is the pH of such solution?. Single line text.At 25oC, a 50mL solution is found to contain 20% by mass acetic acid (CH3COOH). The density of the solution is 1.05g/cm3 . If this solution is diluted further to form 500mL, what will be the: A) [OH- ] B) pH C) % dissociation of the resulting acetic acid solution?For a weak diprotic acid H2X, what is the relationship between [X2-] and Ka2? Under what conditions does this relationship exist?