Concept explainers
Interpretation:
Charge-balance requirement for a solution of ions has to be identified from the given options.
Concept-Introduction:
Charge balance takes place when the sum of concentrations of negative ion and the sum of concentrations of positive ion becomes equal in
Body fluids have small amounts of different type electrolytes and its concentration is measured in equivalents or mill equivalents per liter. An Equivalent
Few examples for the relationship between number of equivalent and charge of an ion is given below,
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Chapter 10 Solutions
General, Organic, and Biological Chemistry
- 4. A solution is made by dissolving 15.3g of solid KCl (formula wt. = 74.6 u) in enough water to give 125mL of solution. What is the molar concentration of KCl in the resulting solution? a. 1.64 b. 0.205 c. 0.164 d. 0.122 e. no correct responsearrow_forwardDetermining the concentration of an acid using an acidbase titration involves completely reacting a measured volume of the acid with a measured volume of a. base of unknown concentration b. base of known concentration c. indicator of known concentration d. no correct responsearrow_forwardWhen 60.0 mL of a 1.00 M solution is diluted by adding 30.0 mL of water, the amount of solute present a. increases b. decreases c. remains the same d. no correct responsearrow_forward
- Problem 4 It takes 0.50 moles of Br,1) to titrate 25.0 mL of H,S,0 (aq) in the reaction: + 4Br, + 5H,0 – 2So + 8Br + 10H* What is the molar concentration of H,S,0,? Enter your answer in the box provided with correct units and sig. figs.: The molar concentration Answer: of H,S2O3(aq) isarrow_forwardsample of a solution has a pH of 11.75. What is the molar concentration of H+ in the solution? a. 5.6 x 10 -3 b. 1.8 x 10-12 c. 7.9 x 10 -6 d. 1.1 x 10 -1 e. no correct responsearrow_forwardA solution is prepared by mixing 25.0 ml of 0.34 M NH3 (pKp-4.74) and 21.0 mL of 0.95 M HCN (pKa=9.21). What is concentration of HCN at equilibrium given the reaction below? NH3 (aq) + HCN (aq) + NH4 (aq) + CN (aq) Numeric Responsearrow_forward
- The chemical reaction that occurs when a HCN/CN buffer system responds to the addition of a small amount of acid is a. HCN+H2OH3O++CN b. H3O++OH2H2O c. CN+H3O+H2O+HCN d. no correct responsearrow_forwardWhat is the concentration of OH¯ at 25° C in 0.25 M nitric acid solution? 4.0x10 0.56 4.0x10 0.60 -14 -13 Answerarrow_forwardA solution with a pH of 12.0 is a. weakly acid b. weakly basic c. strongly basic d. no correct responsearrow_forward
- Which of the following statements is true? a. weak acids will fully dissociate in water b. H2CO3 is a weak acid c. triprotic acids are always strong acids d. salts cannot be made by reacting an acid with a metal e. no correct responsearrow_forward3:58 Chegg Home Expert Q&A Student question KB/S 4G+ .il 56% My solutions Time Left: 01:59:45 PRACTICE EXAMPLE B: What is the molar solubility of Fe(OH)3 in a buffered solution with pH = 8.20? ksp of Fe(OH)3 4.0*10^-38. answer is 9.8*10^ - 21 but I - get 1.00*10 20arrow_forward. A 20.0g sample of NaCl was dissolved in 125mL of water (density = 1.00g/mL). Calculate the weight percent concentration (w/w) of NaCl in the resulting solution. Remember to calculate the total solution mass! a. 86.2 b. 19.0 c. 16.0 d. 13.8 e. no correct responsearrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage Learning