Compare the percentages of water for each trial? Are they close to one another? Why/why not? trial 1 = 28.6% trial 2 = 29.8% trial 3 = 24.8% trial 4 = 28.8%
Q: What volume of a 18% (v/v) hydrochloric acid solution is diluted to produce 350 mL of a 5% (v/v)…
A: Given, initial Concentration befor dilution , C1 = 18% After dilution, C2 . = 5% We need to…
Q: 1-What are the effects of requisites of drinking water?
A: Our planet is made up of more than 71% of water . Our body constitutes of 60% of water. Even our…
Q: 2 It is a type of solution with low concentrations ? Select one: a. concentrated b. unsaturated…
A: Type of solutions: a) Concentrated solution : the solution having higher concentration of solutes…
Q: The latent heat of vaporization of water at 100 oC is 539 kcal/kg. Calculate the boiling point of…
A: The boiling point of water can be determined by the Clausius-Calyperon equation. It can be given as:…
Q: What volume of water would you add to 15.0 mL of 12 M HCl to make it to 6.0 M solution? * 10 mL…
A: Given: Initial concentration of solution, M1 = 12 M The initial volume of solution, V1 =15.0 mL…
Q: Which of the solvents given below will boil first? ethanal = 120.26 KPa %3D ethanoic acid= 1.94 KPa
A: Given-> Ethanal = 120.26 KPa Ethanoic acid = 1.94 KPa
Q: What volume of 0.220 M HBr solution (in mL) is required to obtain 0.060 moles of HBr? A) 3.67 L B)…
A: Given, Number of moles of HBr = 0.060 moles Molarity = 0.220 M
Q: 1. How many ml of sulphuric acid are required to make 1.5L of a 32% (v/v) solution? 2. How many mls…
A:
Q: 500 mL of 1.0 M HCl solution from a concentrated reagent. Concentrated HCl is 36% (w/w)
A: The molarity of the solution is the number of moles of solute present in 1 litre of the solution.…
Q: PPb contains 1 part of solution per 10° parts of solvent. True False
A: Answer PPb contains 1 part of solution per 109 parts of solvent We know…
Q: Calculate the concentration of a soluation when a 15 mL sample of 6 M acetic acid solution is…
A: Given:- To Calculate the concentration of a solution when a 15 mL sample of 6 M acetic…
Q: How does the movement of marble differ in water and in oi
A: This can explained on basis of viscosity which is a characteristic property of fluids. Viscosity is…
Q: 1. Helium gas, 3.00 x 104 g, is dissolved in 200.0 g of solution. Express this concentration in…
A: Parts per million is defined as the parts of solute present in 106 parts of solution. arts per…
Q: Calculate the quantity of each ingredient needed to prepare 15 mL of the following ophthalmic…
A:
Q: Have 50 gallons of water dripping concentrated nutrients into the water system. Need a concentration…
A:
Q: How much water is needed to produce a 0.9% salt solution with 3.0 g of salt? * 327 grams 300 grams…
A: Given, Mass of salt = 3.0 g Concentration of the salt solution = 0.9 % Required,…
Q: What mass of solvent will it take to make 260 g of a 7.5% w / w solution
A: Given :- mass of solution = 260 g % w/w = 7.5 % To calculate :- mass of solvent
Q: 5. Why does slow distillation result in better separation of two liquids than fast distillation?
A: Distillation is a separation technique in which liquid components are separated bu virtue of the…
Q: Determine the amount of sodium chloride required to prepare 500 ml of a 3M sodium chloride solution.…
A: The molarity of a solution is the ratio between the number of moles of the compound to the solution…
Q: e mole fraction
A:
Q: At 25.0 °C the Henry's Law constant for hydrogen sulfide (H₂S) gas in water is 0.087 M/atm.…
A: Given : Henry law constant (KH) = 0.087 M/atm Volume of water = 575 ml Partial pressure of H2S =…
Q: 2. Use the following information to answer the questions below: Density of carbon tetrachloride is…
A: Density of carbon tetrachloride = 1.584 g/cm3 1 cm3 = 1mL
Q: A sample of water is found to contain Ca(HCO3)2 = 40.5, Mg(HCO3)2 =46.5, CaSO4=32.1, CaCl2=22.45,…
A: The water hardness is the presence of dissolved carbonate, bicarbonate, chloride, sulfide, or…
Q: How will you prepare 250 cm3 of a 1 M NaOH solution using NaOH pellets?
A: Given, 250 cm3 of 1 M NaOH solution Volume = 250 cm3 = 0.25 L Molarity = 1 M Molar mass of NaOH…
Q: Concentrated sulfuric acid is 18.0 M. What volume is needed to prepare 1.0 L of 6.0 M sulfuric acid…
A:
Q: Which of the following will not be more soluable in hot water than cold water? a. O2 b. NaCl c.…
A: Correct option is A. oxygen is more soluble in cold water than hot water. These is because as the…
Q: The process of Distillation is able to concentrate ethanol because: a. the boiling point of…
A: Liquid ethanol can be separated from a mixture of ethanol and water by distillation.
Q: Molar solution: Make 100mL of 350mM NaCl.
A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…
Q: How many grams of KCl will be undissolved when 50g of KCl is dissolved in 100g of water at 20.0oC?
A: First we have to find the solubility of KCl at 20.0 oC by referring the solubility chart of…
Q: How much of copper sulphate pentahydrate we need to prepare 0,5L 0,1 M solution?
A: Given, Molarity of the solution = 0.1 M = 0.1 mol/L Volume of the solution = 0.5 L mass (in grams)…
Q: Find the mass of iron (II) sulphate needed to prepare 250mL of 0.600mol/L solution
A: Given: Volume of solution, V = 250 mL =0.250 L Molarity of…
Q: How much sterile water will you have to add to the concentrated solution you calculated from problem…
A: The question is based on the concept of solutions. Molarity is a method of expressing…
Q: 1) Use the experimental data and the graph on the next page to construct a Beer's Law plot. 2) If an…
A:
Q: What mass of MCl is needed to make 3000g of 30% solution? (MW: H= 1 , Cl= 35)
A:
Q: • Measure out a small volume of concentrated (8.0M) stock nitric acid solution and add it to the…
A:
Q: Define the following: 1. solvent 2. mixture 3. solution
A: (1) Solvent - Solution is formed by combination of atleast two Substances, one of them has higher…
Q: Arrange the boiling points of the aqueous solutions, relative to pure water. Assume complete…
A:
Q: Calculate grams of sucrose that must be added to 112.5 grams of water to prepare a 12.5 % by mass…
A:
Q: Which solution has more acetic acid? 10.0 mL of 15% solution or 20.0 mL of 1.11 Moles solution?
A:
Q: The maximum safe level of each compound in drinking water is given below. Convert each value to…
A: The ppm is the unit of concentration written for solution concentration in w/w. The ppm is the unit…
Q: For questions #23 - #27 A solution is made by dissolving 6.26g NaOH in 25.2g water. 19. What is the…
A: The number of moles of a substance is given as the mass of the substance upon its molar mass. The…
Q: How much water (ml) is needed to dilite 8.16 M stock solution of H2SO4 to prepare 5.00x10^2 ml of…
A: For dilution of a solution, M1 V1 = M2 V2
Q: How many liters of a 0.88 M solution can be made with 25.5 grams of lithium fluoride? How many…
A:
Q: Assuming complete dissociation (Ksp > 1010), which salt solution in water will have the highest…
A: The compound, which has more particle in solution those have higher boiling point. And which has…
Q: What is the melting point of a solution that is formed when 620 g of ethylene glycol (C2H6O2) is…
A:
Q: What is the %v/v of 10mL CH3OH (methanol) dissolved in water to a volume of 40mL
A: Percent by volume = (volume of solute /volume of solution)*100
Q: A certain liquid X has a normal boiling point of 147.30°C and a boiling point elevation constant…
A: When a solute is dissolved in the water, the vapor pressure of the solution is lower than the pure…
Q: enriched to a 60 wt % sulfuric acid solution by adding pure sulfuric acid. a. How much pure sulfuric…
A: Given 20 wt% of sulfuric acid is enriched to 60 wt% by adding pure sulfuric acid. The temperature…
Compare the percentages of water for each trial? Are they close to one another? Why/why not?
trial 1 = 28.6%
trial 2 = 29.8%
trial 3 = 24.8%
trial 4 = 28.8%
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
- Will a ppt of SrF2 form if you mix 6.6 x 10-2 M Sr(NO3)2 (aq) with 9.8 x 10-6 M NaF (aq)? (Which of the following is entirely correct?) Q = 6.5 x 107, ppt forms OQ = 2.5 x 10-11, no ppt Q = 6.3 x 10-12, no ppt %3D OQ = 6.3 x 1012, ppt forms O Q = 6.5 x 107, n o ppt50 mL of stock solution were taken and added to flask. Then 50 mL of Di water were added to the flask. This is solution 1. Then 50mL of solution 1 were taken and added to a flask and 50 mL of Di water were added to the flask. This is solution 2. Then 50mL of solution 2 were taken and added to a flask and 50 mL of Di water were added to the flask. This is solution 3. Then 50mL of solution 3 were taken and added to a flask and 50 mL of Di water were added to the flask. This is solution 4. Find the concetrations of each solution. Information of stock solution - molar mass- 534.3g/mole 0.587g in MilliQ5. The following graph is a calibration curve for the density of an aqueous salt solution versus percent salt concentration. If the density of seawater is 1.025 g/mL, what is the percent salt concentration? F3 $ 4 R O F4 Ei % 5 T Density (g/mL) 1.20 1.15 1.10 1.05 1.00 0.95 F5 0 1 6 LO 5 Y 15 Percent Salt 10 F6 S 20 PrtScn & 7 U F7 25 Home * 8 F8 - 75°F End 9 F9 O ^ @ F PgUp 0 2 F10
- 2. Use the formula listed below to calculate how much of each ingredient should be used to make 20,000 ml of Chigger Dope that is used to treat chigger insect bites. Add your solution below the table. Original Conversion New Orange Syrup Formula Factor Formula Benzocaine 400g Methyl Salicylate 160mL Salicylic acid 40g Isopropyl Alcohol NF, 99% 5840mL Pure water qs ad 8000mL Solution:A 50X stock of Bradford reagent would have to be diluted to a 1X working solution prior to use. How much of the stock reagent solution and water are required to achieve this dilution? The final volume of the diluted solution is 1000 mL. Give your answers as whole numbers only (no decimal places). For example, if you think it would take 500 mL of reagent and 500 mL of water to make this dilution, then enter 500 and 500 in the appropriate spaces below. Volume of Bradford reagent required (in mL): Blank 1. Fill in the blank, read surrounding text. Volume of water required (in mL)1-3: A stock solution of 70% v/v ethanol was diluted with distilled water to prepare 1L of 21% v/v ethanol. (Density of ethanol = 0.789 g/mL; MW of ethanol = 46 g/mol) 1. Determine the initial volume of 70% v/v ethanol used in the preparation. 2. How much water was added to the stock solution to make 1L of the final concentration? 3. The molarity of 5.0 mL of 70% v/v ethanol was found to be __________. 4-6: A solution contains 45.0 g of methanol, CH3OH, dissolved in sufficient water to give a total mass of 210.6 g. 4. Compute for the number of moles of the solute present in the given solution. 5. What is the mass (in kg) of water used to dissolve the solute from the given problem? 6. Determine the molal concentration of the said solution.
- Cyclohexanol 10 ml Mass of cyclohexanol 9.62 g – 0.053 mol Theroretical yield cyclohexene–7.89g - ? mol Therotical mass of cyclohexene- Actual yield- 6.8ml –4.055 g –? mol Percent yield- 51.04% Boiling point of cyclohexene -83 degree Celsius Theroretical boling point -83 degree Celsius can i get some clarification plsChemicals AmountBenzophenone 0.523 g (2.87*10^-3mol)Sodium borohydride 0.12 g (3.2*10^-3 mol)Benzhydrol 0.357 g (1.94*10^-3mol)Observed melting point 65-66 degree C Theroretical yield of Benzophenone ________ Percent yield _______________ Theoretical melting point __________--1-3: A stock solution of 70% v/v ethanol was diluted with distilled water to prepare 1L of 21% v/v ethanol. (Density of ethanol = 0.789 g/mL; MW of ethanol = 46 g/mol) 1. Determine the initial volume of 70% v/v ethanol used in the preparation. 2. How much water was added to the stock solution to make 1L of the final concentration? 3. The molarity of 5.0 mL of 70% v/v ethanol was found to be 4-6: A solution contains 45.0 g of methanol, CH3OH, dissolved in sufficient water to give a total mass of 210.6 g. 4. Compute for the number of moles of the solute present in the given solution. 5. What is the mass (in kg) of water used to dissolve the solute from the given problem? 6. Determine the molal concentration of the said solution. 5-7: A 10.34 molal aqueous nitric acid solution was prepared. (Density of nitric acid = 1.51 g/mL, density of water = 1.0 g/mL, and the MW of nitric acid = 63 g/mol) 5. How many grams of HNO3 were used to prepare the solution? 6. What is the Molarity of the…
- 30 20 10 From the procedure 2. Assemble the simple distillation apparatus as generally shown in Figure SD.1 in the lab manual, ensuring that the thermometer bulb is aligned at, or slightly below, the Y in the distillation head. Each ground joint is greased by putting three or four stripes of grease lengthwise around the male joint and pressing the joint firmly into the other without twisting. 3. Attach a water condenser to the distillation head. 4. Remember, water goes in the bottom and out the top. Attach a clamp holder to the end of the drain tube to keep it weighted in the drain. Turn water to a trickle. If it is slowly draining, it is high enough. Begin a low flow of water through the condenser. 5. Place the set up on a heating/stir plate. 6. Turn on the hot plate to start heating the solution. Monitor the temperature and the boiling of the solution throughout the distillation process. 7. Record the temperature of the distillate when the first drops are recovered. 30.0 8. Adjust…Suppose that you have a 1:1 mixture of compounds that is comprised of compound X and compound Y. You desire pure compound X and are planning a recrystallization to enhance the purity. Which solvent below is optimal for your recrystallization? Ethanol (boiling point = 78 °C) Solubility At 0 °C 100 °C Compound X 0.05 g/mL 0.20 g/mL Compound Y 0.02 g/mL 0.40 g/mL Water (boiling point = 100 °C) Solubility At 0 °C 100 °C Compound X 0.02 g/mL 0.05 g/mL Compound Y 0.01 g/mL 0.10 g/mL Methanol (boiling point = 65 °C) Solubility At 0 °C 65 °C Compound X 0.04 g/mL 0.10 g/mL Compound Y 0.02 g/mL 0.30 g/mL Acetone (boiling point = 56 °C) Solubility At 0 °C 56 °C Compound X 0.10 g/mL 0.50 g/mL Compound Y 0.20 g/mL 0.50 g/mL Ethyl Acetate (boiling point = 77 °C) Solubility At 0 °C 77 °C Compound X 0.10 g/mL 0.60 g/mL Compound Y 0.30 g/mL 0.60…Materials Needed solid I2 solid CUSO4-5H20 food dye solid (NH4)2SO4 heavy metals waste container halogenated waste container non-halogenated waste container semi-micro test tubes and rack regular test tubes and rack squash pipettes acetone cyclohexane propan-2-ol Method Part A: Solubility of ionic and molecular solids 1. Place a small amount (about the size of 1 grain of rice, see picture) of copper sulfate into each of three DRY semi-micro test tubes. Add 20 drops of water to the first test tube and gently flick the test tube with your finger to ensure mixing. 2. Repeat step 1 using acetone in place of water as the solvent in the second test tube. 3. Repeat step 2 replacing acetone with cyclohexane in the third test tube. Hold the test tubes against a white background to compare the solubility of copper sulfate in the three solvents and record your results. Discard these mixtures into the heavy metals waste container in the fume cupboard. Once these test tubes have been emptied you…