8. You are asked to make 100 ml of solution containing the following: Component 1 mM Tris (stock solution concentration is 1 M) 50 mM EDTA (stock solution concentration is 0.5 M) 0.25 M NaCl (stock solution concentration is 5 M) H₂O Dilution factor How much? What is the dilution factor for each component? How much of each component do you add to th solution? How much water do you add?

7. During week l's lab we investigated the effect of different soaking solutions on the behavior of red blood cells. If the blood had arrived on time, our prepper would have needed to know how to make up different concentrations of saline (NaCl) solution from a 2.7% stock solution of NaCl. Can you help her by filling in the table below? For each group of students, you want to make 9ml of either 0.9% saline or 0.45% saline. Show your working out below the table you complete. 0.9 0.45 % saline solution wt/vol Volume of 2.7 2.7%wt/vol NaCl in ml Volume of distilled water in ml

From the diagram below, at 10° C, roughly how many grams of NH3 can be dissolved in 100 grams of H2O?   a. 70 b. 45 c. 90 d. 100

A packet of Emergen-C contains 1.000 x 103 mg of vitamin C, also known as ascorbic acid. If this packet were dissolved in 0.25 L of water, what would be the molarity of ascorbic acid in the solution? The molar mass of ascorbic acid is 176.124 g/mol. 1.4x10-3 M 23 М 700 M 2.3x10-2 M 4.0 M Submit Request Answer

Table 4. Concentration calculations Mass of empty evaporating dish (g) 29.258 Volume of NaCl solution (mL) 10.0 Mass of dish and NaCl solution (g) Mass of dish and dry NaCl (g) Mass of NaCl solution (g) Mass of dry NaCl (g) Mass/mass percent (%) Mass/volume percent (%) Moles of NaCl (mol) Volume of NaCl solution in liters (L) Molarity of NaCl solution (mol/L) 40.498 31.164

A solution is prepared by dissolving 23.4 g of CaCl2 (MW = 110.98 g/mol) in 355 mL of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 in this solution is ________ molar.

How many milliliters of a 3.9 M NaCl solution would be needed to prepare each solution? a. 35 mL of a 2.4 M solution: mL b. 170 mL of a 0.79 M solution: mL < Prev 15 of 16 M

For each of the following solutions, how many milliliters of water should be added to yield a solution that has a concentration of 0.125 M?a. 25.0 mL of 1.00 M AgNO3   b. 5.00 mL of 10.0 M AgNO3   c. 2.50 L of 2.50 M AgNO3 d. 75.0 mL of 0.130 M AgNO3

A student is standardizing a sodium hydroxide solution.  He used 23.22 mL of NaOH to neutralize 1.227 g of KHP (molar mass 204.22 g/mol).  What is the concentration of NaOH in mol/L?

What is the mass of H2SO4 (molar mass 98 g/mol) in 400. mL of 0.100 M solution? O 3.92 g O 4.90 g 2.45 g 9.80 g MacBook Air 吕口 F3 F8 F9 F10 F4 F5 F6 F7 F1 2$ % & 2 4. 7 9- * CO 6 %#3