Concept explainers
(a)
Interpretation: A strip of magnesium metal dissolves rapidly in 6.00 mL of a 0.150 M HCl solution, producing hydrogen gas and magnesium chloride.
Assign oxidation numbers to all of the elements in the reactants and products.
Concept Introduction:Here are the rules for assigning oxidation number to elements:
- For an element in its free state it is assigned an oxidation number of zero.
- Monatomic ions have oxidation number that is equal to charge of the monatomic ion.
- Alkali metals have +1 oxidation number, alkaline earth metals have +2 oxidation number and halogens are assigned -1 oxidation number.
- In most compounds H is assigned a +1 oxidation number and O is assigned a -2 oxidation number.
- For a neutral compound the summation of oxidation numbers of all elements in the compound is zero.
If the oxidation number of an element increases then it undergoes oxidation and if the oxidation number of the element decreases then it undergoes reduction.
(b)
Interpretation:
To write the balanced chemical equation for the reaction.
Concept Introduction:In a balanced chemical equation for a reaction the number of atoms of each element is equal on both side of the reaction.
(c)
Interpretation:
To find the oxidizing agent.
Concept Introduction:An oxidizing agent itself gets reduced as it oxidizes other substances. An oxidizing agent accepts electrons.
(d)
Interpretation:
To find the reducing agent.
Concept Introduction:A reducing agent itself gets oxidized as it reduces other substances. A reducing agent losses electrons.
(e)
Interpretation: To find the pH of the 0.150 M HCl solution.
Concept Introduction:
(f)
Interpretation: To find the grams of magnesium that can dissolve in the HCl solution.
Concept Introduction:
Want to see the full answer?
Check out a sample textbook solutionChapter 16 Solutions
Basic Chemistry
- Simple alcohols (just containing C's, H's and an OH, where the H on the O is the acidic H) have a pKa similar to water (15.7) hydronium ion (-2)arrow_forward10.110 A 0.312 M KOH solution is used to titrate 15.0 mL of an H,SO, solution. (10.7) a. Write the balanced chemical equation. b. What is the molarity of the H,SO,4 solution if 28.2 mL of the KOH solution is required?arrow_forwardDetermine the lime and soda ash does, in mg/L as CaO and Na2CO3, to soften the Thames River to a final hardness of less than 125 mg/L as CaCO3. Assume that all the alkalinity is bicarbonate and that the lime is 90% pure and the soda ash is 97% pure. (4.21)arrow_forward
- At 20°C, the solubility of potassium carbonate, K2CO3, is 110.3 g/100. mL of water. In the laboratory, a student mixes 215 g of K2CO3 with 175. g of H2O at a temperature of 20°C. (9.3) a) How much of the K2CO3 will dissolve? b) Is the solution saturated or unsaturated? c) What is the mass, in grams, of any solid K2CO3 left undissolved on the bottom of the container?arrow_forward16.58 Which of the following compounds are soluble in water? (16.2, 16.5) |3| a. CH3-CH2-CH2-C-OH b. CH3-C-0-CH3 c. CH3-CH2-CH2-CH3 OH d. ^arrow_forward(10.2) Calculate the fluoride ion concentration and pH of a solution that is 0.20 M in HF and 0.10 M in HCl. Ka 6.8 × 10¬4arrow_forward
- 9.118 A solution is prepared by dissolving 22.0 g of NaOH in 118.0 g of water. The NaOH solution has a density of 1.15 g/mL. (9.4) a. What is the mass percent (m/m) of the NaOH solution? b. What is the total volume, in milliliters, of the solution? c. What is the mass/volume percent (m/v) of the solution? d. What is the molarity (M) of the solution?arrow_forward1- What is the p H of a 2.31 M solution of HA that has a K a of 1.81E-5? Answer: (2.19) 2- Calculate the percentage that allows for the deliberation of whether or not 0.05 - [H+] ~ 0.05 in accordance with 5% rule. 0.05 M solution of HA with a K a = 7.70E-7 Answer to 2 decimal places (even though this might violate significant figure rules). Answer: (0.39)arrow_forward8. 9. 10.arrow_forward
- You have a large bottle of 10.0 M HCl and you want to make 400 mL of 1.25 M acid. How much concentrated do you need and how much water? (50, 350)arrow_forward(14.6) Which of the following aqueous solution has the highest boiling point? O 1.00 M NaCl O 1.00 M Ca(NO3)2 O 1.00 M C6H1206 O 1.00 M NaNO3arrow_forwardDr. Pepper has an [H+] = 0.000014 M. What is its pH? (4.85)arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY