Question

is the pH and pOH of the acid solution with [H'] = 0.38 M? What is the [H30") and TOH concentration of an acid solution with pH = 5.5? 3. How many liters of 0.186 M of NaOH(aq) contain 0.135 mol of NaOH? If 0.123 g NaOH is dissolved in enough water to make 250.0 mL of solution, what is the molarity (M) of the sodium hydroxide solution? If 2.00 mL of 0.456 M NaOH is diluted to exactly 100 mL with water, what is the concentration of the resulting solution in molarity? 4. Given the following reaction: 2C2H6(1) + 702(g) + 4CO2(g) + 6H2O(D. (a) How many moles of O2 is needed to produce 5.00 g H20? (6) If 8.32 g of ethane react, how many grams of carbon dioxide will be formed? How many grams of water will be produced? 5. A 50.00 mL sample of Ba(OH)2 is titrated with 12.34 mL of 0.5678 M HCl to reach the ending point. What is the concentration of the Ba(OH)2 solution?

Answer 1

#2. pH = -log[nt] or pH = -log [H₃O+] pHe log (0.38) = 0.42 PH + POH = 14 then polt 14-pH = 14-0.42 = 13.58 = 10 5.5m. - H I = 10, so [148] when pH=5.5 Also [t] [OH-] = 10th -19 [OH-] = 109.10 [H3O+] 105,5