A 0.372-g sample of NaOH(s) is added to enough water to make 250.0 mL of solution. The pH of this solution is:
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A 0.372-g sample of NaOH(s) is added to enough water to make 250.0 mL of solution....
A 0.377-g sample of NaOH pellets (molar mass = 40.00 g/mol) is added to enough water to make 250.0 mL of solution. The pH of this solution is: Select one: a. 11.974 b. 12.576 c. 0.424 d. 1.424
A solution is made by mixing 1.5 g of NaOH (mw=40) in enough water to make a solution with a final volume of 1330 mL What is the pH of the solution?
What mass of NaOH must be added to enough water to make 1.50 L of solution having pH of 12.80?
5.0 g of solid Al(NO3)3 was added to enough water to make a 100.0 mL solution. Al(NO3)3 is very soluble in water. 1. Write out the dissolution reaction that occurs when the solid Al(NO3)3 was added to water. 2. What is the concentration, in Molarity, of Al(NO3)3 once it is dissolved in the water? 3. If 53 mL of water was added to the original Al(NO3)3 solution described above, what is the new concentration in Molarity? 4. What is the...
17) How many grams of water are in 250.0 g of a 5% by mass solution? How many grams of sugar are in this solution? 18) A solution is prepared with 45.0 g of NaCl in enough water to make a 50mL solution. What is the molarity of the solution? 19) If 345 g of MgCl, solution is evaporated and 32.8 g of magnesium chloride are collected. What is the mass percent of the salt in the solution? How much...
3. You dissolve the sample of FD&C Red 40 in enough water to make 250.0 mL of solution. We call this the stock solution What is the concentration of the stock solution in terms of molarity? 8.7x10-5 M You are correct. Your receipt no. is 156-2105 4. You make two dilutions. You take 87.60 mL of the stock solution and dilute to 500.0 mL to make Solution #1. You then add 65.28 mL of Solution 1 to 37.34 mL of...
2. A student prepared a stock solution by dissolving 15.0 g of NaOH in enough water to make 150. mL of a stock solution. She then took 22.5 mL of the stock solution and diluted it with enough water to make 250. mL of a working solution. A. What is the molar concentration of NaOH in the stock solution? B. What is the molar concentration of NaOH in the working solution? C. How much of the working solution will she...
A 4.50 g mass of solid Al2(SO4)3 is added in enough water to make 125 mL of solution. What is the molarity of Al3+ ions in the final solution?
2. A student prepared a stock solution by dissolving 15.0 g of NaOH in enough water to make 150. mL of a stock solution. She then took 22.5 mL of the stock solution and diluted it with enough water to make 250. mL of a working solution. (5 pts. each) A. What is the molar concentration of NaOH in the stock solution? B. What is the molar concentration of NaOH in the working solution? C. How much of the working...
51 g of NaOH are dissolved in water to make 4034 mL of a NaOH solution. Use 40 for the molecular weight of NaOH. What is the concentration of the resulting NaOH solution?