ort Sheet 20mL in buret ent: 50:50 water:isopropyl alcohol (v/v) 22 °C perature: Volume of pure t-BuCl sample: ,0OML Initial volume, Vo, of t-BuCl solution: 10mL (3 sig figs.) (3 sig figs.) ulated initial concentration oft-BuCl, [t-BUCI]o: (3 sig figs.) Molarity of NaOH: (0. 25 (3 sig figs.) TIME TOTAL VOLUME OF NAOH ADDED V, NAOH (mL) EXPIRED BURET CALCULATED ME OF DAY In[t-BuCl], (SECONDS) READING [-BuCi), 20ml 21,5mL lo5 mL 22.1mL 2.1mL 22.5mL 2.5mL 22.7mL 2.7mL O sec 0.0 mL :23 240 కె 720 :35 160 1వేర ||40. 1260 23.0mL 3.0mL 40 :42 1380 0 23.2mL 3.2mL

View Assessment ← C Pri Ter Acc X 13 minutes remaining Question 1 blackboard.matc.edu/ultra/courses/_525703_1/outline/assessment/_1556 Blank 1 X Blank 2 Blank 3 All answers must have the correct units. Watch your significant digits! A 55.0 g sample of sugar (C12H22011) is dissolved in 170. g of water. a. What is the mass of the solute? Blank 1 g b. What is the mass of the solvent? Blank 2 g c. What is the mass of the solution? Blank 3 g d. What is the percentage by mass of this solution? (% m/m) Blank 4 % Blank 4 Add your answer Add your answer Add your answer Add your answer Courses Last saved 12:59:40 PM X Questions Filter (6) ▼ + K First < Previous Next

(h) (i) (i) NH₂ (1) (CH3)2NH CHOH acetic acid (1) NaH (2) AIC13 (1) NaH OF (2) Br H Br NMe₂ (1) POC13 (2) Na₂CO3, H₂O

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Determination of unknown acid concentration     Trial 1 Trial 2 Trial 3 Unknown Acid number Volume of acid used (mL) 25 mL 25 mL 25 mL Initial buret reading (mL) 50 mL 50 mL 50 mL Final buret reading (mL) 14.8 mL 15 mL 14.5 mL Volume of NaOH used (mL) 50 mL 50 mL 50 mL Molarity of NaOH       Calculated molarity of HCl (M)               Show a sample calculation of HCl molarity   AVERAGE MOLARITY OF Unknown HCl Show a sample calculation of NaOH molarity

Assignment Score: 45.9% Question 12 of 19 What concentration of CI re [CI¯] =

Question 5 In Step 8 (see below, as well as in the presentation), three different slimes were prepared by adding different amounts of borax solution. Which of the following statements is/are correct? Step 8: Prepare the following slimes and evaluate their properties Sample 1 3 PVA solution 40 mL 40 mL 40 mL Borax solution 10 mL 5 mL 1 mL Deionized water O mL 5 mL 9 mL Breaking length Bounce height 30cm 70cm NA 5cm 10cm NA O The more borax we add, the more rigid the slime will become. O The less borax we add, the less elastic the slime will become. O The change in its properties is due to the added amount of water which will affect the structure of the slime. O The water is added in order to have the same final volume of reactants.

Can someone check to see if #9 through #12 are correct with the information provided

Trial 1 Trial 2 Trial 3 Initial burette reading (mL) 2.29   1.41   1.95   Molarity of NaOH (M) 0.100   0.100   0.100   Volume of vinegar sample (mL) 5.00   5.00   5.00   Final burette reading (mL) 50.37   49.39   49.84 Table 2. Titration data   Trial 1 Trial 2 Trial 3 Initial burette reading (mL) 2.29   1.41   1.95   Molarity of NaOH (M) 0.100   0.100   0.100   Volume of vinegar sample (mL) 5.00   5.00   5.00   Final burette reading (mL) 50.37   49.39   49.84   Expected color at end point       Volume of NaOH used (mL) 48.08   47.98   47.89  Compute for the ff: a.   Average moles of acetic acid (mol)? b.  Average molarity of acetic acid (M)? c.  Average molarity of acetic acid (M)?