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Interpretation:
For titration in problem 10.94
Concept Introduction:
Titration: It is a quantitative analysis method used to express the concentration of acid or base present in the solution.
Reaction between Acid and Base: When an acid reacts with the base
Strong Acids: Acids that dissociates into ions completely which results in easy donation of protons are considered as strong acids. Strong acid forms weaker conjugated base.
Weak Acids: Acids that do not easily dissociate into ions completely which has difficulty in proton donation are considered as weak acids. Weak acid forms stronger conjugated base
Strong Base: Bases that has strong attraction towards protons and accepts readily. Strong base forms weaker conjugated acid.
Weak Base: Bases that has little affinity towards protons. Weak base forms stronger conjugated acid.
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Chapter 10 Solutions
EBK FUNDAMENTALS OF GENERAL, ORGANIC, A
- What is the pH of a 0.25 M solution of acetic acid, Ka = 1.8 x 105. What percentage of the acid is dissociated?arrow_forwardPotentiometric titration curve is given below, which is obtained during the potentiometric titration between strong base KOH (0.2 M) with strong acid HI, label the point in the curve from the following options. If more than one points are present than write as x, y(means separate by using comma) a)The point where pH is because of excess OH - ions. b) The point where pH is only because of HI in water. c)The point where [HI]= [I] in water. d)The point where pH=pka e) The point where all HI is neutralized. f) The point where pH corresponds to solution of [I- ] in water. 14 13 12 11 10 9 pH 6. TITIT TITarrow_forwardOne liter of a 0.1 M Tris buffer (pKa of Tris = 8.3, see Table 2.4) is prepared and adjusted to a pH of 2.0. A) What are the concentrations of the conjugate base and weak acid at this pH?Answer with 2 significant digits. I have solved for [HA] = 0.10 Can you please help solve for [A-] = ?arrow_forward
- The amino acid glycine is often used as an ingredient in buffers for biochemistry experiments. The amino group of glycine has a pKa of 9.6. Glycine exists in either a protonated form (-NH3+) or a free base (-NH₂). a) In what pH range can glycine be used as an effective buffer? b) In a 0.1M solution of glycine at pH 9.0, what fraction has its amino group in the protonated form? c) When 99% of the glycine is in the protonated from, what is the numerical relation between the pH of the solution and the pKa of the amino group?arrow_forwardConsider the following acids and their ionization constant, determine which conjugate base is HCOOH Ka = 1.7 x 10-4 (b) HCN Ka = 4.9 x 10-10arrow_forwardWhat is the pH of a solution of 4.1 x 10-8 M NaOH in otherwise pure water?arrow_forward
- TE buffer consists of 10 mM of Tris-Cl, pH 7.6 and 1mM of EDTA, pH 8.0. You need to prepare 3L of TE buffer and you have the following stock solutions: 500 mM Tris-Cl and 1 M EDTA. How will you prepare the 3L of TE? Write work clearlyarrow_forwardWhat is the ratio of concentrations of acetate ion and undissociated acetic acid in a solution that has a pH of 5.12?arrow_forwardHow many moles of EDTA (C10H16N2O3) do you have in 785µl of a 74MM EDTA solution (Mr(C10H16N203) = 292.24)? Consider all digits of your Givens significant. Round results to the appropriate number of Significant Digits. The number of moles is mmol.arrow_forward
- Trans-oleic acid (18:1,D9) has a melting temperature of (44.5C) and cis-oleic acid (18:1,D9) has a melting point of (13.4C). Briefly explain the difference in melting points between the two.arrow_forwardGlutamic acid (1one of the 20 amino acids) has a side- chain carboxyl group (COOH, pKa = 4.3) as shown in Figures 4.7 and 4.8 a. Write the chemical equation for the dissociation of the side chain COOH. Label the weak acid and the conjugate base. b. The Henderson-Hasselbalch Equation (shown below) can be used to determine the ionization status of a weak acid: pH = pKa + log [base] Use the Henderson Hasselbalch equation to determine whether the glutamic acid side chain [acid] • carboxyl group is protonated or deprotonated at physiological pH.arrow_forwardConsider the titration of 30.0 mL of 0.0700 M HONH2 (a weak base; Kb = 1.10e-08) with 0.100 M HI. Calculate the pH after the following volumes of titrant have been added: (a) 0.0 mLpH = (b) 5.3 mLpH = (c) 10.5 mLpH = (d) 15.8 mLpH = (e) 21.0 mLpH = (f) 27.3 mLpH =arrow_forward
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