Table 4.2 Determination of acetic acid content in vinegar sample. mL of Volume of NaOH, mL % (w/v) Replicate Sample Initial Final Volume added (mean±SD) 1 10 mL 0.00 7.8 250 mL 10 mL 7.8 15.3 25 mL 10 mL 15.3 22.4 3 50 mL
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- A solution of HCl was titrated against sodium carbonate. What is the average normality of acid in the given data? (MW Na₂CO3 = 106) T2 0.3479 0.3562 0.3042 Weight (g) Initial V (ml) 0.80 1.60 35.20 36.70 39.80 Final V (mL) Vol HCl used (mL) 35.10 39.40 N of HCl (eq/L) 0.1954 0.1870 Average N of HCl (eq/L)Concentration of the KSCN stock solution, M Volume of the KSCN stock solution, mL Initial molar concentration of SCN in a 50-ml flask, M PART A. Establishing the Beer's Law Coefficient: blank 0 0 solution 2 1.00×10-³ 2.00 solution 3 1.00×10-3 5.00 solution 4 1.00×10-³ 10.00 solution 5 1.00-10-3 15.00101 Bb UTF-8"Lab%205-%20PI x Bb UTF-8"Lab%202-%20st Bb UTF-8"Lab%201-%20SCX I https://mssu.yellowdig x Question 4 of 34 If you have 155 mL solution of a 0.762M FeCl solution, how many moles of FeCl, are contained in this sample? mlsetuton ADD FACTOR DELETE ANSWER RESET *( ) 1 1000 162.2 10 35.45 6.60 55.85 0.01 12.6 0.203 100 0.118 0.1 0.001 155 4.92 0.762 19.2 11.8 118
- Benzalkonium Chloride (E=0.16) =1.5g Distilled water qs 0.9% NaCl solution ad =100 mL Make isoton. Sol. Apply on affected area p.r.n. 1. How many mL of distilled water must be added to make the Benzalkonium chloride preparation isotonic? 2. How many mL of 0.9% NaCl must be added to make a 100 mL solution?TELEGRAM •K KINEMASTER Preperation of solution Preperation of Sodium Carbonate (Na2CO3)= 209; S =32 ). What is the solubility of Bi2S3 in g/L (At. Mass: Bi = Ksp Bi2S3= 1.6 x 10-72 Answer format: 1.00x10-14 (Don't put the unit. Round-off your final answer in two decimal place)
- Ans. 17.15 mg. 54) A 1.000-g sample of a mixture which contains only NaCl and KCl gare a precipitate of AgCl which weighed 2.000 g. What are the percentages of Na and K in the mixture? ins 10 g Ans. 44.77% K; 5.75% Na. 1:J 55. I- can be sernarated from othorHow many mL of 0.779 M HNO3 are needed to dissolve 5.15 g of BaCO3? esc 1 F1 AAB 2 Q *** F2 W # 3 80 F3 E $ 4 000 000 F4 2HNO3(aq) + BaCO3(s) Ba(NO3)2(aq) + H₂O(l) + CO₂(g) R Cengage Learning | Cengage Technical Support % er oo 5 F5 MacBook Pro T A 6 F6 & 7 Y F7 mL * DII U F8 8 DO 9 1If the same mass of Na2SO4 (MW: 142 g/mol) and K2SO4 (MW: 174 g/mol) were weighed and used for the gravimetry experiment, which will yield a greater amount of precipitate? Assume that the experiment was done correctly. Indeterminate, it will depend on the (A amount of BaCl2 used. Na „SO, , because it has a smaller В molecular weight. They will yield the same amount of precipitate because the same mass was initially weighed. K,SO, , because it has a larger (D molecular weight. 4
- :ci: ✓ ALC13 2. HND 3, H₂SO4 3. Fe, HCI 1. NEW 3 ' 2. Br₂, FeB 1. mg, Et₂0 2. 3. Then H30+ O: 1. ' AICI 3 2. HB, H₂O reflux :CF 1. ✗, AIC13. D 2. 503, H₂504 3. Br₂, FeBrz 4. Dilute H2S04Moving to another question will save HS nestion 3 Determine if the indicated experimental change (on left) would cause an increase, decrease or no change to the solubility of a salt whose AHsolution = -2 O kJ mol-1 A decrease solubility v adding heat Bincrease solubility v surrounding the solution and the beaker with an ice bath Cno change to solubility K Question 3 of 29>> AMoving to anotther question will save this response. PIX 24 4. & 1 2 6. 8 delete Q E R T Y P A S D F G K L enter return shi alt option command command option5. а. Atropine sulphate 1.2% Boric acid q.s. Purified water q.s. ad 15mL M. ft. ophth. sol. Calculate the amount of boric acid needed to make this solution isotonic. (Sodium chloride equivalents: Atropine sulphate = 0.13, boric acid = 0.5) b. How many mg of Codeine Phosphate are being consumed daily by a patient taking the following prescription as directed? Codeine Phosphate 200mg Simple Syrup q.s. 120ml Sig.5ml tid pc & hs