(a)
Interpretation:
Amount of solute or solvent needed to prepare the following solution is to be identified.
Concept Introduction:
In order to express the concentration, many units have been used. One among them is
(b)
Interpretation:
Use of
Concept Introduction:
In order to express the concentration, many units have been used. One among them is
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Fundamentals of General, Organic, and Biological Chemistry (8th Edition)
- What mass of sodium glycolate (NaC2H3O3) should be added to 400.0 mL of 1.00 M glycolic acid to produce a buffer solution with a pH of 4.00? Ka = 1.47 x 10-4. Please indicate the full solutions.arrow_forwardQuinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =arrow_forwardCalculate the normality of a solution that contains 4.5 g of (COOH)2 in 3000 mL of solution? (Assume the (COOH)2 is to be completely neutralized in an acid-base * reaction.) 0.033 N O 0.33 N O 0.166 N O 0.0166 N 0.45 N O 0.045 N 000.0 OOarrow_forward
- How many grams of NaOH are needed to make 50 mL of a 0.02 g/mL NaOH solution? How many grams of HCl are needed to make 10 uL of a 0.005g/mL acid solution? How many grams of CuSO4 would you use to make 1 L of an 8 g/L CuSO4 solution? 12 grams of glucose will make how many mL of a 0.5 g/mL solution? If you mix 9 g of NaOH with 90 mL of water, what is the mass/volume (g/mL) concentration of the solution?arrow_forwardIf an aqueous solution has a hydroxyl ion concentration of 1 × 10-6 M, what is the concentration of hydrogen ion ([H+]) ? [H+] = 1.0 x10-5 Marrow_forwardWhat volume of 0.1M NaOH (reagent) needs to be added to increase your 7.5 pH (buffer) by 0.5 pH units. The goal is to further purify MOPs (see image). Protonated form = 6.6 x 10.3^-3 mol/L Deprotonated form = 1.32 x 10^-2 mol/L Show calculations.arrow_forward
- 6 x 10⁻⁵¹ = (0.15 M)² [S²⁻] [S²⁻] = (6 x 10⁻⁵¹) / (0.15 M)² Calculating, we find the minimum concentration of sulfide ion required: [S²⁻] ≈ 2.7 x 10⁻⁴⁹ M. check it calcution is writearrow_forwardDescribe the preparation of 2.00 L of 0.100 M glycine buffer, pH 9.0, from glycine and 1.00 M NaOH. What mass of glycine is required, and what volume of 1.00 NaOH is required? The appropriate pKa of glycine is 9.6arrow_forwardYou have just used up the last of a 1.2 % m/m solution of agarose in water. You require another 100mls. How many grams of Agarose do you require? Note 1ml of water=1g What is the % w/v of a 100ml solution containing 5g of NaCl?arrow_forward
- (a) Cholesterol isolated from natural sources is enantiopure. The observed rotation of a 0.3-g sample of cholesterol in 15 mL of chloroform solution contained in a 10-cm polarimeter tube is −0.78°. Calculate the specific rotation of cholesterol. (b) A sample of synthetic cholesterol consisting entirely of (+)-cholesterol was mixed with some natural (−)-cholesterol. The specific rotation of the mixture was −13°. What fraction of the mixture was (+)-cholesterol?arrow_forwardMixtures of amino acids can be analyzed by first separating the mixture into its components through ion‑exchange chromatography. Amino acids placed on a cation‑exchange resin containing sulfonate (−SO−3)(−SO3−) groups flow down the column at different rates because of two factors that influence their movement: (1) ionic attraction between the sulfonate residues on the column and positively charged functional groups on the amino acids, and (2) aggregation of nonpolar amino acid side chains with the hydrophobic backbone of the polystyrene resin. Note that the ionic attraction is more important than hydrophobicity for this column media. For each pair of amino acids, identify which will be eluted first from a cation‑exchange column using a pH 7.0pH 7.0 buffer.arrow_forwardThe enzyme urease is widely used for determining urea concentration in blood. The Michaelis constant for urease at room temperature is 2.0 mM and k2 = 2.8 × 104 s-1 at pH = 7.5. Based on the kinetic experiment, when 0.34 mM urease was used, the initial rate of the reaction was determined to be 3.49 M/sec. What is the concentration of urea in blood in unit of mM? Please keep your answer to two decimal place. Please convert all concentration unit to mM in calculation.arrow_forward