Concept explainers
Interpretation:
The volume of
Concept Information:
Mole can be calculated by mass of the substance or solution divided by molar mass of the substance or solution.
Where,
M is Molar mass of the substance
m is mass of the substance
To Calculate: The volume of
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Chemistry: Atoms First
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- Amino acids are an important group of compounds. At low pH, both the carboxylic acid group (CO2H) and the amine group (NHR) are protonated. However, as the pH of the solution increases (say, by adding base), the carboxylic acid proton is removed, usually at a pH between 2 and 3. In a middle range of pHs, therefore, the amine group is protonated, but the carboxylic acid group has lost the proton. (This is called a zwitterion.) At more basic pH values, the amine proton is dissociated. What is the pH of a 0.20 M solution of alanine hydrochloride, [NH3CHCH3CO2H]Cl?arrow_forwardUsing the acid ionization constant information given in Table 10-3, indicate which acid is the stronger in each of the following acid pairs. a. H3PO4 and H2PO4 b. H3PO4 and H2CO3 c. HPO42 and H2PO4 d. HC2H3O2 and HCNarrow_forwardMalic acid is a weak diprotic organic acid with Ka1 = 4.0 104 and Ka2 = 9.0 105. a Letting the symbol H2A represent malic acid, write the chemical equations that represent Ka1 and Ka2. Write the chemical equation that represents Ka1 Ka2. b Qualitatively describe the relative concentrations of H2A, HA, A2, and H3O+ in a solution that is about one molar in malic acid. c Calculate the pH of a 0.0175 M malic acid solution and the equilibrium concentration of [H2A]. d What is the A2 concentrationin in solutions b and c?arrow_forward
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- Which of the following is the correct expression for Ka? Assume the acid dissociation is HA + H2O <--> H3O+1 + A-1arrow_forwardDraw Lewis structures that show how electron pairs moveand bonds form and break in the following reaction, andidentify the Lewis acid and Lewis base.B(OH)3(aq) + 2 H2O(/) + B(OH)4^- (aq) +H3O^+(aq)arrow_forwardBoric acid, BOH is used as a mild antiseptic. What is the pH of a 0.025 aqueous solutionof boric acid? What is the degree of ionisation of boric acid in this solution? Thehydrogen ion arises principally from the reaction:B(OH)3(aq) + H2O(l) B(OH)4(aq)_+ H+(aq)The equilibrium constant for this reaction is 5.9x10-10arrow_forward
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