A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: The label on the graduated cylinder says: empty weight: 3.550 g|| • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 17.43 g. • She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 61.60 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. - 1 •mL ?

A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: The label on the graduated cylinder says: empty weight: 3.550 g|| • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 17.43 g. • She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 61.60 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. - 1 •mL ?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

The solubility product constant for a certain metal phosphate, M3(PO4)2 is Ksp = 2.1 × 10−27. Its molar mass is ℳ = 279.04 g/mol. What is its solubility in g/L? Report your answer to TWO significant figures. Enter your answer in scientific notation using the appropriate boxes. Remember, a number like 1.6, in scientific notation is 1.6 × 100.
How many millilitres of 0.450 mol L−1 H2SO4(aq) are required to completely neutralize 46.7 mL of 0.930 mol L−1 KOH(aq) ? Hint: Write a balanced chemical equation for the reaction. Give your answer in mL, accurate to three significant figures. Do not include units as part of your answer.
imagine that a 2.0 m colution of copper 2 chloride is added to a piece of aluminum. draw a particulate representation of the mixture after any reaction has completed
A student requires 45.0 grams of solid silver chloride to precipitate. What volume of a 0.50 M solution of silver nitrate, AgNO3(aq), should they add to a solution which contains excess sodium chloride, NaCl(aq)?
A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 6.0 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 94.86 g. • She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 122.28 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. 1 [1] 8.mL-¹ x10 X Ś
5. A solution of calcium nitrate, (Ca(NO3)2, reacts with a solution of ammonium fluoride, NH4F, to form solid calcium fluoride, CaF2, and ammonium nitrate, NH NO3 (aq). When 45.00 mL of 0.48724 M Ca(NO3)2 solution was added to 60.00 mL of 0.99981 M NH4F solution, 1.524 g of CaF2 was isolated from the filter paper. a. Write a balanced molecular equation for the reaction. Include all states of substances. b. Calculate the number of moles of product Ca(NO3)2 that you start with. c. Calculate the number of moles of NH&F that you start with. d. Calculate the grams of CaF2 that might be made based on your answers from 'b' & 'c' e. Identify the limiting reagent Ca(NO3)2 or NH&F (circle one) f. Calculate the percent yield of CaF2 based on the information given in the problem.
4d
Sodium carbonate dissociates when it dissolves in water as follows: If the concentration of the sodium ions is 0.817 mol/L, then what is the concentration of the sodium carbonate solution? Record only your numerical answer with the correct number of significant digits. You do not need to include units as the units appear for you beside the answer box already.
570.0 mL of 0.4820 M CaCl2 is combined with 182.0 mL of aqueous 219.40 mM LICI. What is the chloride ion (CI) concentration in the resulting solution? Assume that the volumes of the two solutions are additive. Express your answer in units of millimolarity (mM) using at least three significant figures.
"In the lab, a student makes a solution of NaOH by dissolving 49.0 grams of solid in 195 mL of water. What is the molarity of the NaOH solution that the student prepared? The molar mass of NaOH is 39.9971 g/mol." 6.28 M 7.28 M 0.00628 M 0.419 M 10.1 M
Two beakers sit on a balance; the total mass is 167.170 g. One beaker contains a solution ofKI; the other contains a solution of Pb(NO3)2. When the solution in one beaker is poured completely.into the other, the following reaction occurs:What is the total mass of the beakers and solutions after reaction? Explain completely?
A solution containing 405.6 mM CaCl₂ is combined with an equal volume of 176.1 mM NaCl. What is the concentration of chloride (CI) ions in the resulting solution? Express your answer using units of millimolar (mM) using at least three significant figures.