Solutions, Acids, Bases- LAB Name. Part 1-PREPARING MOLAR SOLUTIONS period date

Question

Solutions, Acids, Bases- LAB Name. Part 1-PREPARING MOLAR SOLUTIONS period date Part 2- Using a stor Calculate the volume i of a 1 60 M dilated so glass rod, no need to Figure 15-13 Preparing Molar Solutions Accurataly preparing a sokonthink you would preparolation of sacrONE takes care of solute to be used is measured COw) for an exporine? A 1.5OMt aqaoous solution of sec out in stap 2, the sol te is tam 1.50mle of use-led n a lact of soluua The sela mass placed in a volumetrk flask of distilled water is added to the lask to bring the solution leve up to the calbration mark on the flask 1.50 13 g C 5. Calculate t of a 0.80 M glass rod, a 1. Prepare 100.0 mL of a 0.035M solution of CuCl 2110 using tap water. Show calculation of mass needed here. Write a procedure (see steps above) CoCl 2 Pour some into a test tube 3. After comparing, please dump the solution in the disposal beaker near the sink

Explanation / Answer

Given, molarity of solution needed = 0.035 M, volume of final soultion = 100.0 mL and molar mass of CuCl2.2H2O = 170.5
1 M solution is when 1 mole of solute is dissolved in to 1000 mL of solvent.
(0.035 mole / 1000.0 mL) x (170.5 g / 1 mole) = 5.968 g / 1000 mL
Thus to prepare 0.035 M solution we need to disolve 5.968 g in 1000 mL.
However we are preapring 100.0mL solution. Hence total grams of CuCl2.2H2O = (5.968 g / 1000 mL) x (0.1/0.1) = 0.5968 g / 100.0mL
Hence, to prepare 0.035 M solution we need to disolve 0.5968 g in 100.0mL.

Procedure: 1) Measure exact 0.5968 g of CuCl2.2H2O and place it in to 100mL standard volumetric flask.

2) add appropriate volume of distilled water to the volumetric flask (up to the mark)

3) Shake well to dissolve the solid.

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.