Part A Sodium benzoate is a food preservative. What is its chemical formula ? (Consult a handbook or the Internet.) Source: Handbook of Chemistry and Physics ΑΣφ ? DA chemical reaction does not occur for this question. Submit Request Answer Part B What is its approximate range of solubility in water? (Consult a handbook or the Internet.) Source: Handbook of Chemistry and Physics O between 70 - 80 g per 100 mL, at 20 °C between 50 - 60 g per 100 mL, at 20 °C O between 40 - 50 g per 100 mL, at 20 °C O between 60 - 70 g per 100 mL, at 20 °C Submit Previous Answers

Procedure A: Molarity (M=g/MM/L) Step 1. Place one-eighth of a teaspoon (this weighs approximately 0.5 grams) of NaCl (table salt) in the graduated cylinder provided. Then add distilled water to that graduated cylinder until the level of the water reaches 45.00 mL. Mix thoroughly about 1 minute. Pour solution into a somewhat clear cup. Remember what this looks like for Procedure B. Questions: Is this a saturated solution? Why or why not? Take a picture and insert a picture (compress your image) of your solution here. Save this solution for Step 2. Calculations: Determine the Molarity of this solution using the formula M = g/MM/L. You know the grams (one-eighth of a teaspoon weighs approximately 0.5 grams), look up the Molar Mass of NaCl, and convert your mL to L to solve the problem.) Show your calculations for Molarity here. C % 31 D < hp & * ✔

Hydrochloric acid (11.4 mL of 0.230 M) is added to 279.0 mL of 0.0720 M Ba (OH), solution. What is the concentration of the excess Ht or OH¯ ions left in this solution? Molarity = M Drag and drop your selection from the following list to complete the answer: OH H+

Calculate the volumes, in mL, of: ethanol, C2H5OH (ρ= 0.789 g/mL), that must be dissolved in water to obtain 2 L of 1.65M solution. -concentrated hydrochloric acid solution  (HCl, 36% by mass, ρ = 1.18 g/ml) that mustdissolve in water to obtain 500 ml of 0.234 M HCl solution.