Before performing a titration of vinegar itself, you first had to standardize the solution used to analyze vinegar. State the name (an abbreviation is fine) of the compound used standardize the test solution and explain why that compound was selected for use in standardization.

A student prepared a standard copper solution by combining 2.63 mL of stock 0.270 mol/L copper(II) sulfate solution with 6.37 mL of water. What is the molar concentration of Cu2+ in this solution? Give your answer in in decimal format. When entering units, use proper abbreviated units with proper capitalization.

Most analytical machines used in science can either measure absorbance of light, like the spectrophotometers used BioZ 151 and 152 labs, or can measure change in electrical conductance. In order to convert things like absorbance values into concentration data, a linear regression is used. In order to determine nitrite concentration in water samples, nitrite is reacted with several chemicals to produce a purple color. The absorbance of the solution is measured from known amounts of nitrite to produce a standard curve to analyze samples. Use the data in the provided table, or from the linked spreadsheet to make a graph and perform a linear regression using treadline. mg/L NO3 Absorbance 0 0.1 0.3 0.5 0.7 o 0.183 0.542 0.914 1.298) 1.61) In order for this to work, samples must be diluted prior measurement so that the concentration falls within the range of the standard curve. If a sample underwent a 30 dilution, and produce an absorbance value of 0.953, what is the resultant concentration…

Lithium hydroxide solid is used for removing gaseous carbon dioxide exhaled by astronauts in space vehicles. The products formed are lithium carbonate solid and water. Write a balanced equation for this reaction and calculate how many grams of gaseous carbon dioxide are absorbed by 1.50 g of lithium hydroxide solid.

In the acid-base neutralization reaction between 0.75 M HNO3 (aq) and 0.75 M Ba(OH)2 (ag), the acid and base will react in a molar ratio of mole acid to mole base.

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.

1. A 4.24 g sample of a laboratory solution contains 1.42 g of acid. What is the concentration of the solution as a mass percentage? 2. Isopropyl alcohol is mixed with water to produce a solution that is 35.0% alcohol by volume. How many milliliters of each component are present in 645 mL of this solution?

You have a solid mixture that contains lithium bromide and barium carbona. Use the Handbook of Chemistry and Physics to propose a method to separate these two solids.

When answering this problem, report the answer with the appropriate number of significant figures. Enter your answer USING scientific notation. When entering units, use proper abbreviated units with proper capitalization. In this experiment, a series of solutions are prepared by combining multiple components into a single container. One solution prepared contains 5.00 mL of 0.010 molar KI, 10.00 mL of 0.0010 molar Na2S2O3, 15.00 mL of water, 10.00 mL of 0.040 molar KBrO3, and 10.00 mL of 0.10 molar HCl.  What is the concentration of iodide ions in this solution? Answer: ____x10______units

Volumetric Analysis: Determination of Acetic Acid in Vinegar You measured the vinegar volumetrically in procedure B1, what piece of data was needed to determine the volume needed from the mass of vinegar?