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- 10A Complete the figure below. Br NaCN DMSO B A NH₂ C 1. Br₂, NaOH 2. H₂O/H* TT. H₂SO4How much Na2SO4 is required to precipitate 2.50 g of Ba(NO3)2 in the form of BaSO4? AW: Ba = 137.33, Na = 22.99, S= 32.07, N = 14.01, O = 16.00 O 2.50 g O 0.0176 mole O 0.0191 mole O 1.36 gBaCO3 - Ba2+ + CO3? reaction was given. It is known that the carbonate anion is hydrolyzed in [HCO ][OH] [co? ] CO3- + H20 = HCO; + OH Kb1 and [H2CO3][OH¯] [HCO3] HCO; + H2O = H;CO3 - OH- Kb2 = form. Since Ka1 = 1.44x10-7, Ką2 = 4.7x10-11 and KspBaco3 = 5.1x10-9, calculate the solubility of BaCO; salt at pH = 8 and 12 depending on the pH value.
- 4. Predict the effect of temperature decrease, (b) pressure increase, (c) concentration increase of O2 on the concentration of all species. Answer using "more" or "less". 2 SO3(9) O2(9) + 2 SO2(9) AH = - 47 Kcal a. b. С.What would (triangle) Hrxn be for this new situation with 40 ml of both 1.0 M NaOH and 1.0 M HCl, Ccal=166.8? The final temperature was 28.9 C, the initial temperature was 22.1 C.Given: 0.35g NaCI, 0.25 g NaHCO3, 0.15 g KCI & 2 g C6H1206 are present in 100 mL ORS solution (MW: Na: 23, K: 39, CI: 35, H: 1, C: 12, o: 16) Calculate the total amount of bicarbonate expressed in mmol/L present in the prepared solution O 60.34 mmol/L O 80.61 mmol/L O 29.76 mmol/L 90.10 mmol/L O 111.11 mmol/L 20.27 mmol/L
- benzoic acid, HC-H;O: K, = 6.6 x 10-5The density of the 99.8 ml solution is 1,093 g/ml and it contains 12% KI by mass. This solution is added to 96.7 ml of solution containing 14% Pb(NO3)2 by mass and density of 1,134 g/ml .Calculate the mass of PbI2 formed? (Ma: K: 39,098 g/mol; I: 126,905 g/mol; Pb: 207,2 g/mol; N: 14 g/mol; O: 16 g/mol) Pb(NO3)2 (aq) + 2 KI (aq) à PbI2 (k) + 2 KNO3 (aq)Given: 0.35g NaCl, 0.25 g NaHCO3, 0.15 g KCl & 2 g C6H12O6 are present in 100 mL ORS solution (MW: Na: 23, K: 39, Cl: 35, H: 1, C: 12, O: 16) Calculate the total amount of bicarbonate expressed in mmol/L present in the prepared solution a 90.10 mmol/L b 80.61 mmol/L c 29.76 mmol/L d 60.34 mmol/L e 111.11 mmol/L f 20.27 mmol/L
- 11. You have a solution that is 18.2% sodium thiosulfate, Na2S2O3 , by mass. If 75.0 g of the sodium thiosulfate solution is diluted to 250.0 mL with water, what is the molarity of the resulting solution? please show work12KOH + 6I2 -> 10KI + 2KIO3 + 6H2O calculate the number of moles of KOH to produce potassium iodidea. 2.14b. 6c. 5.3d. 0.0612. A 5.000 gram sample of Na2CO3 X H₂O was heated to a constant weight of 1.853 grams. Na2CO3 = 106 g/mole & H₂O = 18.0 g/mole a] Determine the percentage of water in the sample. [1] Na Co alu 0.1029 b] Determine the value of "X" in the formula: Na2CO3 X H₂O. 5.000g Naz Naz CO₂ Naz [2]