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In order to undertake a spike recovery trial of a method for the analysis of alanine, you need to prepare the solution for the spike addition. Typical levels vary from 10 to 50 mg/L alanine. The analysis requires a sample of 5 mL.
a. What concentration of alanine is needed, and what volume of that solution should be added to each sample prior to analysis for the spike addition?
b. Using that spike, what is the added alanine that would be expected in the sample at 100% recovery?
In combustion studies of H2 as an alternative fuel, you find evidence that the hydroxyl radical (HO) is formed in flames by the following reaction
0.74 L of a 0.41 M solution is diluted to a final volume of 3200 mL. What is the resultant molarity?
Problem- What is the rate constant of a first-order reaction that takes 6.00 minutes for the reactant concentration to drop to half of its initial value
Using the structure of mathyl orange as an example, draw resonance froms to show how conjugation extends throughout the molecule.
What are the concentrations of Cu2+, NH3, and Cu(NO3)4 2+ at equilibrium when 18.8 g of Cu(NO3)2 is added to 1.0 L of a .800 M solution of aqueous ammonia? Assume that the reaction goes to completion and forms Cu(NH3)4 2+.
For the following reaction, 21.9 grams of sodium chloride are allowed to react with 67.0 grams of silver nitrate. sodium chloride (aq) + silver nitrate (aq) silver chloride (s) + sodium nitrate (aq) What is the maximum amount of silver chloride th..
A polarization potential arises from a concentration difference between ions in the neighborhood of the electrode and those in the bulk of the electrolyte solution. Calculate the polarization potential in a copper electro-refining cell given the f..
A sports beverage company is seeking an energy supplement to increase the performance of the athletes. An ongoing research project suggest the use of a tetrasaccharide with the following characteristics
When the satellite reaches the position m, its speed is 6.17 m/s. How much work did your friend do?
Calculate the pH at the equivalence point in the titration of 25.00 mL of 0.120 M chloropropanoic acid (Ka = 7.8 x 10-5)
1. during the titration several milliliters of deionized water are added to the erlenmeyer flask containing the khp
Problem- Using the appropriate Ksp values, find the concentration of K+ ions in the solution at equilibrium after 500 mL of 0.40 M aqueous Cu(NO3)2 solution has been mixed with 350 mL of 0.20 M aqueous KOH solution. (Enter in M.) (Ksp for Cu(OH)2 ..
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