Identify the acids which are strong enough to react completely with hydroxide or with bicarbonate ion
If C has a lower Pka (5.3) than the bicarbonate ion (6.4) then why does it not react completely? Why is it just D?
9. Hydroxide ion: A, C, D
Bicarbonate ion: C, D
Explanation: The pKa value indicates the acid strength. Lower the value of pKa, stronger is the acid. For hydroxide ion, the pKa value for the conjugate acid H2O is higher than the compounds shown in A, C and D. Hence they are stronger acids than hydroxide ion to react completely.
For bicarbonate ion, using the same logic both C and D will be stronger acids so that reaction will be complete. The compound shown in C has a low pKa value and should react with bicarbonate ion to give H2CO3. There is no reason for only D to be the answer here.
10. The resonance structure shown in the question is correct.
Identify the acids which are strong enough to react completely with hydroxide or with bicarbonate ion...
References Acids and Bases Compound a Compound b Compound c A" phenol= pka:9.89 B= pentane-2,4-dione= pka:9 C=dimethyl malonate pka=13 Which of the compounds above are strong enough acids to react almost completely with a hydroxide ion (pKa of H2O = 15.74) or with a bicarbonate ion (pKa of H2CO3 = 6.37)? Enter your answers as an alphabetized string, i.e. abc, not cba; enter none if none of the compounds are strong enough acids. Hydroxide ion: Bicarbonate ion:
Titration: Acids and Bases 2. How can you determine which acid is diprotic? 3. using the answers to questions one and two, which acid is diprotic? 4. Which base has more hydroxide ions per molecule? Acid Volume Base Base Initial Volume (mL) Base Final Volume (mL) Volume of Base Used (mL) Acid: Base Ratio Acid 1 20 mL Base 1 50 mL 34.5 15.5 4:3 Acid 2 20 mL Base 1 Acid 1 20 mL Base 2 Acid 2 20...
17.6 Based on the information in Appendix D, calculate the pH and trimethylammonium ion concentration of a solution of trimethylamine, (CH3) 3N, 0.075 M, and trimethylammonium chloride, (CH3) 3NHCl, 0.10 M. CONSTANTS OF AQUEOUS BALANCE Кок LO X 107 3.0 X 10-12 X L6 X 10 12 Kat 18 X 105 5.6 X 10- 5.1 X 10-10 3 X 10 6.3 X 105 5.8 X 10 10 15 X Ls 43 X 10 14 X 1st 1 x 102 74...
It's a weak acid strong base titration Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
Below is a lab hand out for the questions. All my data for the questions are filled out below in BOLD LETTERING. All the questions I need answered are at the bottom with boxes where to put the answers. Background Alka-Seltzer� is an over-the-counter antacid and pain relief drug. The tablet contains aspirin (acetylsalicylic acid), citric acid, and sodium bicarbonate (NaHCO3). Sodium bicarbonate (NaHCO3) is responsible for the effervescent action of Alka-Seltzer. In this lab we will investigate the reaction...