Lab 7 Dilution Problems

Constants I Periodic Ta 35.0 g MgBr, in 220.0 mL of solution Express your answer with the appropriate units. HẢ M% = Value Units Submit Request Answer Part D 35.0 g Li2 C03 in 220.0 mL of solution Express your answer with the appropriate units. HÁ M = Value Units C.

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Percent by Mass= Mass of Solute x100 Percent by volume and Percent by Mass calculations Mass of Solution Volume of Solute Name: Percent by Volume= -x100 Volume of Solution 1. 1. Calculate the percent by volume if 56.7 ml of alcohol is added to 540 ml of water. (Remember to add both solute and solvent to get the total volume of solution to put on the bottom.) 540 15.23 2 Calculate the percent by mass if 35.0 grams of NaC! is added to 455 grams of water to make a salt solution. 3. Calculate the percent by volume if 15.5 ml of HCI is added to 1.0 Liter of water. 4. Calculate the amount of water needed to make a 5% solution of alcohol, if you have 25 ml of alcohol? (Hint: first you will need to find the total amount of solution needed. then subtract the 25 ml from that.)

I need help in calculating the total mass of the unknown #2 sample of copper. The following chemical equations are in used: 2 Cu2+ + 4 I -> 2 Cus + I2  I2 + 2 S2O3-2 -> 2 I +S4O6-2  To standardize the Sodium Thiosulfate  Average copper weight = 0.2536 g Average volume = 25.46 mL The Analysis of the Unknown #2 sample of copper Average mass of the unknown #2 sample of copper = 1.2474 g Average volume of sodium thiosulfate = 14.30 mL   I came up with a molarity of 0.1567 for NaS2O3. Is it correct? I am coming up for the mass of the unknown #2 sample of copper: 0.1348 grams. Is that also correct?

Convert the following measurement. =0.00397 (kg)/(mol x dL) = ? (g)/(mol x L)   I dont know what the steps are to take to get the answer. Would the first step be converting the 0.00397 from kg to g?

McGraw Hil ALEKS CHEMISTRY-Gener... esc E ! 1 MEASUREMENT AND MATTER Adding or subtracting and multiplying or dividing measurements Explanation -1 gml1 Q A 1 A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 1.500 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 96.6 g. She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 97.7 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant…

Obtain values from the pictures found in the procedure to complete the data table below.Remember to include units!A. Data: 4 Mass graduated cylinder + HCl(aq)5 Mass empty graduated cylinder6 Mass HCl(aq) used

A chemist prepares a solution of copper(II) fluoride (CuF;) by measuring out 1.31 mg of copper(11) fluoride into a 50 mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/1. of the chemist's copper(II) fluoride solution. Be sure your answer has the correct number of significant digits. moll. OP

2.93 g Measured Volume of Water: 100.0 mL each question with correct significant figures and units. You must show calculations for determining each quantity. If necessary, use the molar mass of NaCI = 58.44 g/mol. You will be asked to show your work for each question. A.Determine the number of moles of NaCI in the solution B.Determine the number of moles of all solutes (both cations and anions) from the number of moles of NaCI that you determined above. C. Determine the mass (in kg) of solvent (assume that the density of water is 1.000 g/mL). D. the molality of all solutes.

A www-awm.aleks.com O CHEMICAL REACTIONS Using molarity to find solute mass and solution volume Brittney v A chemist adds 255.0 mL of a 0.0658 mmol/L barium chlorate (Ba(CIO;).) solution to a reaction flask. Calculate the mass in milligrams of barium chlorate the chemist has added to the flask. Round your answer to 3 significant digits. I mg Explanation Check 2021 McGraw-HIII Educetion All Rights Reserved. Terms of Use Privacy Accessibility

PRACTICAL: STANDARD SOLUTION & DILUTIONS Dilutions of Solution S Prepare dilute solutions of copper(II) sulfate pentahydrate from Solution S. You must pipette Solution S from a small beaker. Solution 1: Transfer 15.00 mL of water from a burette to a 50-mL conical flask. Then add 5.00 mL of Solution S with a 5-mL pipette. Mix the solution well. Label this solution Solution 1. Solution 2: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 250-mL volumetric flask. Then add enough water up to the calibration mark. Mix well. Label this solution Solution 2. Solution 3: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 50-mL volumetric flask. Then add enough water up to the calibration mark. Mix well. Label this solution Solution 3. Solution 4: Transfer 25.00 mL of Solution S with a 25-mL pipette to a 100-mL volumetric flask. Then add enough water up to the calibration mark. Mix well. Label this solution Solution 4. Calculations: Determine the molarities of Solutions 1, 2, 3…

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A chemist must prepare 850. ml. of 10.0 mM aqueous potassium permanganate (KMnO,) working solution. She'll do this by pouring out some 13.0 mM aqueous potassium permanganate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in ml. of the potassium permanganate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits. D X 5

Q14: what is the correct answer answer, please follow the rules when answering the question

What volume, in mL, of 10.9 M HCl is required to make 492 mL of 0.546 M HCl?   Include 3 significant digits in your answer

How many milliliters of 1.50 M potassium hydroxide solution are needed to provide 0.125 moles of potassium hydroxide? Provide an answer correct to 2 significant figures. For example, if you calculate that the correct answer is 12.00 moles, simply type 12 in the box. Do not answer this question using scientific notation. Do not include units in your answer. (hint: this is like the previous problem. You're given two of the three variables in the molarity equation. You need to find the third.)

Whilst working in the pharmacy aseptic unit you are asked to prepare 5 litres of a solution containing potassium ions 1 mmol/mL. What weight of potassium chloride is required? (atomic weight of potassium = 39: atomic weight of chlorine = 35.5) Units - g

Kindly help me with this please.

11 of 11 I Review | Constants Periodic Table Suppose that you want to find the equation for a line that passes through the two points (0,3) and (4, 9). What is the slope of this line? Express your answer numerically. > View Available Hint(s) Πνα ΑΣΦ ? m = Submit rt C Complete previous part(s) 9:41 PM 36%

O MEASUREMENT AND MATTER W start Page Predicting the units of the solution to a basic quantitative... A student sets up the following equation to solve a problem in solution stoichiometry. (The ? stands for a number the student is going to calculate.) Enter the units of the student's answer. 1 mL 0.59 mL - 3 10 x10 108.39 mol II

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after 5.63g sample of Wood's metal has been added to the water in a 10-mL graduated cylinder, the new water level us 8.7 mL. what is the water level in the cylinder before the sample was added?

If 125 mL of a 1.2 M glucose solution is diluted to 550.0 mL, what is the molarity of the diluted solution? ?=M Express your answer using two significant figures.