Complete the table below. Round each of your entries to 2 significant digits. You may assume the temperature is 25 °C. formula conjugate acid Κα a -10 н, во 5.8 × 10 -7 H2CO3 4.5 × 10 formula conjugate base K₁₂ ☐ ☐ x10 -8 HÌNH, 1.1 × 10
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- A soft drink contains an unknown mass of citric acid, C3H5O(COOH)3. It requires 6.42 mL of 9.580 × 10−2-M NaOH to neutralize the citric acid in 10.0 mL of the soft drink. C3H5O(COOH)3(aq) + 3 NaOH(aq) → Na3C3H5O(COO)3(aq) + 3 H2O(ℓ) Determine which step in these calculations for the mass of citric acid in 1 mL soft drink is incorrect? Why? n (NaOH) = (6.42 mL)(1L/1000 mL)(9.580 × 10−2 mol/L) n (citric acid) = (6.15 × 10−4 mol NaOH) × (3 mol citric acid/1 mol NaOH) m (citric acid in sample) = (1.85 × 10−3 mol citric acid) × (192.12 g/mol citric acid) m (citric acid in 1 mL soft drink) = (0.354 g citric acid)/(10 mL soft drink) Determine the correct result.What is the pH of (3.21x10^-1) M C5H5NHBR? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: х10 AnswerMorphine, C17H19NO3, is a weak monoprotic base that is often used to control severe post-operative pain. Calculate the % ionization of a morphine solution prepared by dissolving 380 mg of morphine in 200 mL of solution. For morphine, Kb = 1.62 × 10–6. * Provide your answer to two decimal places and without units. Avoid using scientific notation.
- Complete the table below. Round each of your entries to 2 significant digits. You may assume the temperature is 25 °C. formula conjugate acid Hạ BO, HBrO I Don't Know R F * % 5 Ka 5.8 x 10 0- -10 2.3 × 10 T -9 Submit G 80 B ^ 6 formula 0 C₂H₂N I Y conjugate base 0 MacBook Pro H & 7 N Kb 0 1.7 X 10 0 -9 00 8 1 M 0, X ( 9 K 0° 0.2 S O © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center ) O L P O : 1 { = 2 142.0 mL of 0.170 M NaOH and 37.6 mL of 0.420 M NaOH. Assume that the volumes are additive. Enter your answers, separated by a comma, using three significant figures. ΠΫΠΙ ΑΣΦ MNa+, MOH 11 → C ? MA chemist prepares a solution of silver(I) perchlorate AgClO4 by measuring out 470 mol of silver(I) perchlorate into a 200 mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's silver(I) perchlorate solution. Round your answer to 3 significant digits. molL
- A 0.100 M solution of an unknown acid, HA, is 3.95% ionized. Complete the following table, but instead of using the variable x, calculate the number values of each quantity and report these values to the correct number of significant figures. Fill in all of the cells. Include signs in the Change column to indicate a gain or loss of concentration. Do not include any units in your answers, M is assumed. To enter values in scientific notation follow the convention: 0.00753 = 7.53E-3 Submit Answer Tries 0/45 What is the Ka of HA? Calculate your answer to three sig figs. K₂= Submit Answer Tries 0/45 Now calculate the pH of the solution of HA. pH= Initial Change Equilibrium [HA] [H+] [A]1597 59 S ||| 2 O CHEMICAL REACTIONS Calculating ion molarity using solute mass A chemist prepares a solution of magnesium bromide (MgBr₂) by measuring out 2.1 g of MgBr, into a 300. mL volumetric flask and filling to the mark with distilled water. V Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to the correct number of significant digits. Microsoft O W Microsoft Microsoft 6.52.210... esc mol L Explanation 18 ! 1 Check 9,206 2 # 3 103 NOV 6 X $ 4 O 67 5⁰ % 5 stv 6 Y 2 & 7 © 2022 McGraw Hill LLC. All Rights Reserved. U * CO 66 8 A 9 I 1 Terms of Use | Privacy Center | Accessibility W 0 0 P { [ do F }The mass of Earth's atmosphere is 5.3 x 10 metric tons. The atmospheric abundance of helium is 0.7 ppm when expressed as a fraction by mass instead of by volume, as in Table 4-1. How many metric tons of helium are there in the atmosphere? How many moles of helium is this?
- An analytical chemist weighs out 0.111 g of an unknown diprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. He then titrates this solution with 0.1000 M NaOH solution. When the titration reaches the equivalence point, the chemist finds he has added 18.8 mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 3 significant digits.An aqueous solution at 25 °C has a H₂O concentration of 6.2 × 10¯M. Calculate the OH concentration. Be sure your answer has the correct number of significant digits. -7 1.61 × 10 M x10 X ŚIn a titration experiment, 29.1 mL of 0.953 M HCOOH neutralizes 23.2 mL of Ba(OH)₂. What is the concentration of the Ba(OH), solution? Round your answer to 3 significant digits. M 0x10 X 5
