Pre-lab: Experiment 6 All Sections 1. Define the following terms: Surface tension Viscosity Freezing point Freezing point depression 2. What causes water hardnėss? Which of these can cause permanent and temporary hardness?
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- Calculate the temporary hardness, permanent and total hardness of the sample of water from the following results. Also indicate if the sample is Permanent or Temporary. H=1, C=12, 0=16, N=14, Mg = 24, K = 39, Cl=35.3, Ca= 40,S=32, Na =23 If the sample is Permeant use P Temporary T Neither permeant nor temporary use X Blank 1 Blank 3 Blank 5 Blank 7 Sample M₂CO3 Nacl CaCO3 Ca(NO3)2 CaCl₂ KSO4 Mg(NO3)2 MgCl, MgSO4 Blank 9 Blank 11 Blank 13 Blank 15 Blank 17 Blank 19 Total permanent hardness? Total Temporary hardness? Total Hardness? Mg/1 30.2 12.5 42 55.5 22.8 12 60 32 45 Mg(HCO3)2 38 Molecular weight Hardness 85 58.3 100 164 110.6 135 148 94.6 120 146 Blank 2 Blank 4 Blank 6 Blank 8 Blank 10 Blank 12 Blank 14 Blank 16 Blank 18 Blank 20 Blank 21 Blank 225. What is melting point depression? Why does it happen? (hint - think IMFs) Additionally, label the area of the graph below. 128 120 110 100 90 80- X 1 Y 130 120 118 110 100 90 80Data Table 1 Enter the calculated molarity and measured conductivity values in the table. Data Table 1: Experimental Data Sodium Total Sodium Chloride Standard Chloride Volume Concentration (M or Conductivity (µS) (g) (mL) mol/L) Blank 100.00 8.965 A 0.0059 100.00 В 0.0531 100.00 0.1029 100.00
- ust.blackboard.com/ultra/courses/_156381_1/cl/outline Remaining Time: 40 minutes, 54 seconds. ¥ Question Completion Status: Moving to the next question prevents changes to this answer. Quèstion 1 Module 2.1. Which of the following statements is/are correct? I. Water is good at dissolving ions and polar molecules, but poor at dissolving nonpolar molecules. II. A polar molecule is one that is uncharged, but has an asymmetric internal distribution of charge, leading to partially positive and partially negative regions. III. Water interacts differently with charged and polar substances than with nonpolar substances because of the polarity of its own molecules IV. Water molecules are polar, with partial positive charges on the hydrogen, a partial, and negative charge on the oxygen. O l only O l and IV 01,, and II O I I, II, and IV A Moving to the next question prevents changes to this answer. Type here to search 32°C Mostly cloudyO po:ri C67) متبقي ۳ ۱۸:۳:. . متعد د الخيارات What is the volume of sulfuric acid H2S04 needed to prepare a dilute solution of it with a volume of 1 liter and a concentration of 1 N if you know that the Specific Gravity = 1.84,% = 98, H = 1, S = 32, 0 = 16 %3D %3D 27.17ml 17.27ml 12.77ml 77.12ml ع الكيمياء التي تهتم بدر( 103Are Particles Visible? Can it be Filtered? Do Partices Settie? See Tyndal Effect? Example Mixture Solution No saltwater Colloid No Suspension Yes Part 3 Separating Mixtures 15. Since the parts of a moture are combined, they can be separated rather easily. 16. F in the table below to sutmarize the 6 different separation techniques described. Technique Description Separates larger solids from smaller solids by passing them through mesh. Separates magnetic from non-magnetic materials Separates an insolluble solid from a liquid by passing it through a filter. Separates a soluble sold from a liquid by boling off the liquid. Separates a liquid from a soluble solid in solution by boiling and cooling it. Separates mitures of liquids with different boiling points using a condenser. Separates matures of liquids with afferent solubilities using absorbent paper. Part 4 Properties.of Matter 17. Matter can be described by 2 types of properties: and properties 18. A) s a property of matter one can…
- What is meant by water hardness? Explain the difference between temporary and permanent hardness.M Inbox Post Atte x M MyOpen xM MyOpen x S Petition f x O Watch the x Sy 2+2 - Ste x E My Home x * OWLV2 | x ngagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References) Use the References to access important values if needed for this question. The boiling point of diethyl ether, CH3CH,OCH,CH3, is 34.500 °C at 1 atmosphere. K(diethyl ether) - 2.02 °C/m In a laboratory experiment, students synthesized a new compound and found that when 13.43 grams of the compound were dissolved in 216.3 grams of diethyl ether, the solution began to boil at 34.935 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound ? pt g/mol pt pt Submit Answer Try Another Version 2 item attempts remaining pt pt 1 pt 1 pt 1 pt 1 pt 1 pt 1 pt 1 pt Previous Next Email Instructor Cengage Learning | Cengage Technical Support 2$ 3 4 7 8. 9. W R Y U6. Describe the differences between flocculated and deflocculated suspensions. 7. What is the purpose of a wetting agent in a suspension dosage form?
- 102 Experiment 12 Determination of Molar Mass by the Freezing Point Depression Method 2. The equation ATf = Kfm is only strictly applicable to very solutions. 3. The f.p. lowering (AT;) only depends on the molality and is independent of the nature of the solute. This is known as a property. 4. A solid is melted then allowed to cool and the temperature of the liquid is recorded every 2 minutes. According to the plot below, the most probable f.p. of the solid is °C. 75.5 75.0 74.5 74.0 73.5 73.0 72.5 72.0 71.5 71.0 70.5 4 6. 10 12 14 16 18 20 22 24 26 Time (min) Temperature (°C) (Figure created by David Sarno.) р. 102102 Experiment 12 Determination of Molar Mass by the Freezing Point Depression Method 2. The equation ATf Kem is only strictly applicable to very solutions. 3. The f.p. lowering (AT) only depends on the molality and is independent of the nature of the solute. This is known as a - property. 4. A solid is melted then allowed to cool and the temperature of the liquid is recorded every 2 minutes. According to the plot below, the most probable f.p. of the solid is. °C. Temperature (°C) 75.5 75.0 74.5 74.0 73.5 73.0 72.5 72.0 71.5 71.0 70.5 0 2 4 6 8 10 12 14 Time (min) 16 18 20 22 24 26 (Figure created by David Sarno.For nonideal solution, like ethanol and water the less volatile component in this mixture has a _____ vapor pressure Group of answer choices chemical less more slightly