No plagiarism Please! Station #6 = HClO4 (aq) For this acid, what does the white bead represent?________ blue bead? __________ 3rd Color Bead? _________ Record your observations in the particulate drawing. How many acid molecules have broken into ions? Determine the % ionization for the acid. Write the ionization reaction for this acid. ________ → ______ + _______

No plagiarism Please! Station #6 = HClO4 (aq) For this acid, what does the white bead represent?__ blue bead? 3rd Color Bead? _ Record your observations in the particulate drawing. How many acid molecules have broken into ions? Determine the % ionization for the acid. Write the ionization reaction for this acid. → + _____

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 121AP: Calcium carbonate, CaCO3, can be obtained in a very pure state. Standard solutions of calcium ion...

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Calcium carbonate, CaCO3, can be obtained in a very pure state. Standard solutions of calcium ion are usually prepared by dissolving calcium carbonate in acid. What mass of CaCO3 should be taken to prepare 500. mL of 0.0200 M calcium ion solution?
Give the correct chemical formulas of the products of an acid-base neutralization between H2SO4 and KOH. (Numbers will be assumed to be subscripts in your answer.) Do not try to enter any physical states or coefficients in the answer boxes. The order in which you list the products does not matter. What is the coefficient in front of the KOH in the balanced equation for the reaction? (Report a single digit for your answer.)
ENB Assume the densities of all solutions are 1.0 g/ml and their specific heat capacities 4.184 J/g. Experime The enthalpy change of neutralization Part I 3 NH4OH(aq) + HCl(aq)- NH4CI(aq) + H2O(E) 2.1 Equation of reaction: 2.0 M HCI 2.0 M NH.OH Volume Number of moles 0.05 25 ml 25 ml 0.05 Temperature 15 °C 15 °C eaction Initial Temperature,T Final Temperature, T Change in temperature, AT 15 °C 16.5 °C 1.5 °C Calculation of q- in J (q- = - qsa) 2.2 What is the enthalpy change (AH) in kJ.mol, when 1 mol of acid is 2.3 neutralized?
What must be the coefficient of O2 in this reaction 2 NaClO3 → 2 NaCl + ____O2 ?
The following volumes of 0.000300 M SCN- are diluted to 15.00 mL. Determine the concentration of SCN- in each sample after dilution. These values will be used during the experiment. Sample 0.000300 M SCN- (mL) [SCN-] (M) 1 1.50 2 3.50 3 7.00 4 10.00
Pre-Lab Questions 1. Explain the benefit of letting the solutions of HCl(aq) and NaOH(aq) sit overnight. 2. When using the same graduated cylinder to measure the volumes of HCl(aq) and NAOH(aq), it is important to rinse the cylinder with water and a small amount of the second reactant before measuring the volume of the second reactant. Explain why this is important for this investigation. 3. Describe how to perform each of the following safely: • diluting a strong acid solution with water • dissolving a solid base in water • adding a solution of base to a solution of acid 4. If acid comes in contact with your skin, why must you flush the area with plenty of cold water, rather than neutralizing the acid with a base?
Volumetric Analysis Liza carefully pipets 25.0 mL of 0.525 M NaOH into a test tube. She places the test tube into a small beaker to keep it from spilling and then pipets 75.0 mL of 0.355 M HCl into another test tube. When Liza reaches to put this test tube of acid into the beaker along with test tube of base, she accidentally knocks the test tubes together hard enough to break them and their respective contents combine in the bottom of the beaker. Is the solution formed from the contents of the two test tubes acidic or basic? What is the pH of the resulting solution?
Acid Data table Initial volume of Vinegar Percent acetic acid in vinegar sample HG mc Base Data table mol base = mol acid I mol acid Imol base Concentration of NaOH solution 0125 M Initial volume of NaOH in buret 12.50 ml 0.98 Post-Activity questions 15.30 ML Mol of acetic acid 10.016 mol Final volume of NaOH in buret 54.00mL 50.ML 41.90mL n mol acid 0.016E am Slov mol acce Molacid 16m² yoland (2) 0.016 Molarity of Acetic acid 10.994 M. Mol NaOH added. 51.5 49.12 12616 1. Does your molarity of acetic acid agree with the percent of acetic acid present in the sample? Use a calculation to determine this 2. At what pH does phenolphthalein turn pink? Do you think this causes an error in the measurement of the equivalence point? 3. Describe how determining the titration of an unknown base with a known acid using phenolphthalein as an indicator would differ from our titration today. Discussing the expected changes in color would from phenolphthalein would be a good way to frame your answer.
You may want to reference (Pages 338 -340) Section 10.5 while completing this proble Calculate the OH value of each aqueous solution. Part A oven cleaner, with [H3O*] = 1.0 × 10-12 M Express your answer using two significant figures. Submit Request Answer Part B milk of magnesia with [H3O+] = 1.5 x 10-9M. Express your answer using two significant figures. ? P Pe Copyright © 2021 Pearson Education Inc. All rights reserved. MacBook Air
The Kjeldahl analysis is used to determine the protein content of foods. The food analyzed is heated with sulfuric acid in the presence of a catalyst. The carbon in the protein is converted to carbon dioxide, the hydrogen to water, and the nitrogen to ammonium sulfate. The mixture is then treated with concentrated NaOH(aq) and heated to drive off NH3(g). The NH3(g) is neutralized by an excess standardized acid, and the acid present after the neutralization is titrated with a standardized base. From the titration data and the known mass of the sample, the percentage of N can be calculated. Based on the fact that the average percentage of nitrogen in most plant and animal protein is 16.0%, the percentage of protein is obtained by multiplying the percentage of N by the factor (100/16) = 6.25. Before performing a Kjeldahl analysis, you decide to standardize (i.e., determine the concentration of) the acid to be used in your titration and determine the molarity of your aqueous sulfuric acid…
Find the coefficients infront of water to balance the following reactions Ca₂P₂ + H₂O PH3 three, 3 Six, 6 Four, 4 Seven, 7 Ca(OH)2
Give the correct chemical formulas of the products of an acid-base neutralization between H2SO4 and Al(OH)3. (Numbers will be assumed to be subscripts in your answer.) Do not try to enter any physical states or coefficients in the answer boxes. The order in which you list the products does not matter. Formula of one product (do not include the coefficient): Answer Formula of other product (do not include the coefficient): Answer What is the biggest coefficient in the balanced chemical equation for the reaction? (Report a single digit for your answer.) Answer