7:17 LTE 7) If you are told a line has a slope 12 g/ml and it came from a plot using a formula of y (B/4) x+ 12 what is the value of B? Show ALL work here: 8) A 0.01L (10 ml.) water sample is taken from a local swimming pool and tested by a pool Lab Service for the NaCl concentration. The molarity was found to be 0.001 M (moles/Liter). The swimming pool contains 10,000 L of water in it. What is the NaCl concentration/molarity of the entire pool contents? 9) If you dispense 3.0 ml. NAOH (0.050M) solution into a container holding 7.0 mL distilled water what is the new concentration of NaOH in this new container? (Show work) intial final 49 ml 10) Look at burette image on the right and complete the blanks: 1mL. Initial Reading Final Reading: Amount Dispensed:

7:17 LTE 7) If you are told a line has a slope 12 g/ml and it came from a plot using a formula of y (B/4) x+ 12 what is the value of B? Show ALL work here: 8) A 0.01L (10 ml.) water sample is taken from a local swimming pool and tested by a pool Lab Service for the NaCl concentration. The molarity was found to be 0.001 M (moles/Liter). The swimming pool contains 10,000 L of water in it. What is the NaCl concentration/molarity of the entire pool contents? 9) If you dispense 3.0 ml. NAOH (0.050M) solution into a container holding 7.0 mL distilled water what is the new concentration of NaOH in this new container? (Show work) intial final 49 ml 10) Look at burette image on the right and complete the blanks: 1mL. Initial Reading Final Reading: Amount Dispensed:

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 95AP: 95. Many metal ions form insoluble sulfide compounds when a solution of the metal ion is treated...

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What volume of 0.250 M NaOH is required to react completely with 0.0100 moles of H2SO4? (a) 80.0 mL (b) 60.0 mL (c) 40.0 mL (d) 125 mL
Which of the following solutions contains the greatest number of particles? Support your answer. .0 mL of 0 10 M sodium chloride .0 mL of 0.10 M calcium chloride .0 mL of 0.10 M iron(III) chloride .0 mL of 0.10 M potassium bromide .0 mL of 0.10 M sucrose (table sugar)
You need to make 150.0 mL of a 0.10 M NaCI solution. You have solid NaCl, and your lab partner has a 2.5 M NaC1 solution. Explain how you each independently make the solution you need.
95. Many metal ions form insoluble sulfide compounds when a solution of the metal ion is treated with hydrogen sulfide gas. For example, nickel(II) precipitates nearly quantitatively as NiS when H2S gas is bubbled through a nickel ion solution. How many milliliters of gaseous H2S at STP are needed to precipitate all (he nickel ion present in 10. mL of 0.050 M NiCl2 solution?
6-15 Answer true or false. (a) A solute is the substance dissolved in a solvent to form a solution. (b) A solvent is the medium in which a solute is dissolved to form a solution. (c) Some solutions can be separated into their components by filtration. (d) Acid rain is a solution.
Distinguish between the terms slightly soluble and weak. electrolyte.
You need 300. mL of 0.500-M K2Cr2O7. Which method is best to prepare this solution? Explain your choice. (a) Dilute 250. mL of 0.600-M K2Cr2O7 to 300. mL. (b) Add 50.0 mL water to 250. mL of 0.250-M K2Cr2O7. (c) Dilute 125 mL of 1.00-M K2Cr2O7 to 300. mL. (d) Add 30.0 mL of 1.50-M K2Cr2O7 to 270. mL of water.
1. A 0.57 gram sample aspirin (MM=180 g/mol) is crushed and dissolved in water. The sample is titrated with 0.20 M sodium hydroxide. The titration required an average volume of 8.50 ml of sodium hydroxide to reach the endpoint. What is the purity of the sample? 2. Nitrosyl chloride, NOCl, dissociates on heating as shown below. When a 1.50 gram sample of pure NOCl is heated at 350 oC in a volume of 1.00 liter, the percent dissociation is found to be 57.2%. What is the quilibbrium constant? NOCl <-> NO + 1/2 CL2
f 27.31 mL of potassium permanganate solution is required to titrate q.0521 g of ferrous ammonium sulfate hexahydrate, FeSo4(NH4)SO4x6H20, calculate the molarity of the KMnO4 solution
Assume that the molarity of the standardized KMnO4 solution is 0.025 M and it takes 23.00 mL to reach the endpoint when titrating a dilute sample of H2O2. How many moles of H2O2 are in the diluted sample initially? Group of answer choices
A student places 20.00mL of .1005 M HCl in a flask and adds a few drops of phenolphthalein. She adds a NaOH solution of unknown molarity to a buret and records the initial reading as 1.50 mL. She adds the NaOH solution from the buret ro rhe HCl solution until a pale pink color is obtained and records the final buret reading as 22.00 mL. What is the molarity of the NaOH solution? Show your calculations.
In a titration, 15.5 g of oxalic acid was dissolved in a flask and neutralized with 31.2 mL of NaOH. Determine the molarity of the NaOH. Hint: Primary standards (like oxalic acid, here) incude water in their formula. As a result, they do not absorb atmospheric water. Oxalic acid has the chemcial formula: H2C2O4⋅2H2O (so be sure to include the 2 extra water molecules). a. 8.33 M b. 3.55 M c. 7.88 mol/L d. 0.333 mol/L