To prepare a 400mL solution of sodium hydroxide (NaOH) with a pH of 12, how much NaOH is needed?
To prepare a 400mL solution of sodium hydroxide (NaOH) with a pH of 12, how much...
17. How much sodium hydroxide, NaOH(s), is needed to prepare 300 mL of 0.200 M NaOH(a)? 18. What is the purpose of an indicator in an acid base titration?
How much NaOH (in grams) is needed to prepare 785 mL of solution with a pH of 10.470?
4. Calculate the volume of 1 M sodium hydroxide (NaOH) needed to prepare 10 ml of a 0.10 M sodium hydroxide solution. 5. Calculate the volume of 1 M hydrochloric acid (HCI) needed to prepare 10 mL of a 0.10 M hydrochloric acid solution. 6. Determine the volumes of 0.10 M CH3COOH and 0.10 M CH3COONa required to prepare 10 ml of the following pH buffers. (Note: the pka of CH3COOH =4.7) C. pH 3.7 b. pH 47 C. pH...
A 1.00 L aqueous solution contained 5.80 g of sodium hydroxide, NaOH. What was the pH of the solution at 25°C.
When 400ml of a 0.01M CaCl2 solution is mixed with a 300ml if a NaOH solution at pH 9.0, a precipitate will form. True or false?
In this procedure it is important to store the sodium hydroxide, NaOH, solution securely capped to avoid evaporation of water. 1. What would the impact of leaving the plastic bottle of sodium hydroxide open to the atmosphere and allowing some of the water to evaporate be on the concentration of the solution. Would the concentration be higher, lower, or unchanged. Provide an explanation for your answer. 2. If the sodium hydroxide, NaOH, solution was not re-standardized after some of the...
A chemist must prepare 750.0 mL of sodium hydroxide solution with a pH of 13.70 at 25 °C. She will do this in three steps: • Fill a 750.0 mL volumetric flask about halfway with distilled water. • Weigh out a small amount of solid sodium hydroxide and add it to the flask. • Fill the flask to the mark with distilled water. Calculate the mass of sodium hydroxide that the chemist must weigh out in the second step. Round...
A chemist must prepare 650.0mL of sodium hydroxide solution with a pH of 12.90 at 25°C. He will do this in three steps: Fill a 650.0mL volumetric flask about halfway with distilled water. Weigh out a small amount of solid sodium hydroxide and add it to the flask. Fill the flask to the mark with distilled water. Calculate the mass of sodium hydroxide that the chemist must weigh out in the second step. Round your answer to 2 significant digits.
For convenience, one form of sodium hydroxide that is sold commercially is the saturated solution. This solution is 19.4 M, which is approximately 50% by mass sodium hydroxide. What volume of this solution would be needed to prepare 2.50 L of 4.08 M NaOH solution?
Preparation of Sodium Hydroxide Titrant: Prepare 500 mL of a 0.1 M sodium hydroxide solution by dilution of a 1 M sodium hydroxide stock reagent or from solid NaOH. This dilution need only be performed to 5% accuracy, that is, using a graduated cylinder and an Erlenmeyer flask. Store the diluted solution in a polyethylene bottle. Standardize the diluted solution against dry, solid KHP (potassium hydrogen phthalate) using phenolphthalein as an indicator and label the bottle with the concentration of...