You have a stock solution certified by a manufacturer to contain 175.0 z 0.3 wg SO;"/ml. You would like to dilute it by a factor of 100 to obtain 1.750 g/ml. Two possible methods of dilution are stated. For cach method, calculate the resulting absolute uncertainty in concentration. Use the manufacturer's tolerances in the table for uncertainties. Glassware Tolerance 1-ml. transfer pipet 10 ml. transfer pipet 100-ml, volumetric flask +0.006 ml. 10.02 ml. +0.08 ml. Method A: Dilute 10.00 ml. up to 100 ml. with a transfer pipet and volumetric flask. Then take 10.00 ml. of the dilute solution and dilute it again to 100 ml. abuolute uncertainty: wg/mL Method B: Dilute 1.000 ml. up to 100 ml. with a transfer pipet and volumetric flask. absolute uncertainty: t wg/ml

A student obtains the following data: a- Mass of evaporating dish                                                 21.345 g b- Mass of evaporating dish and saturated NaCl solution 42.817 g c- Mass of dish and NaCl after evaporation                         38.915 g Report the Mass % of NaCl in this solution.  Write the number as a percentage with the correct number of significant figures as shown. (i.e. 25%)  There should be no space between the numbers and the % sign.

3. A solution of 20.91 % by weight H,So, has a specific gravity of 1.150. What is the normality of this solution? Water is added to dilute this solution to a solution of 3.03% by weight H,SO, (SG= 1.020). What is the new normality of the resulting solution and how were they mixed? (Assume 100 ml of the original solution was used.)

ab 1.2b – Worksheet hoduloz nl sl Name: anlov ient) noitulce to J1 ni bavloaie Lab Period: tw nottuleen Concentrations and Dilutions Review ean no Reading: Silverthorn 7e Fig. 2.7 p. 42 Student Learning Objectives: Explain the different ways concentration is expressed Define all terms used Explain the concept of a mole and Avogadro's number for ionizing and non-ionizing solutes Calculate molarity, grams, molecular weight, and volumes in problems Make the calculations necessary to perform serial dilutions. Use the concept of a mole to calculate the number of moles or grams to be used in chemical reactions. Physiologists spend a lot of time working with chemical solutions needed for various lab techniques. You therefore need to know how to make up solutions of known concentrations and to make appropriate dilutions of these solutions. Concentration: the amount of solute present per unit of solvent. stom Solute: the minor component of a solution; the substance dissolved in another…

On a balance mass an amount of potassium hydrogen phthalate (KHP) needed to neutralize approximately 12 ml of 0.1 M NaOH(aq), and completely transfer the KHP to a clean 125-ml Erlenmeyer flask. Record the mass of the KHP at least to The thousandth decimal place. please answere

A chemist prepares a solution of sodium carbonate (Na, CO,) by measuring out 77.3 g of sodium carbonate into a 300. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's sodium carbonate solution. Round your answer to 3 significant digits. dla ||mol/L x10 Ar Explmation Check 2022 McGraw Hill LLC. All Rights Reserved. Tems of Use Privacy Center Accessibilt 80 F 9:02 AM Cloudy 4/1/2022 DELL F12 PrtScr Insert Delete PgUp PgDn F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F1 Num Lock & Backspace %24 <.

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Drug: C20H22ClN (Flexeril also known as iCyclobenzaprine HCl Using unit analysis, clearly show the set-ups for your calculations. You wish to prepare 50.0 mL of 2.30 x 10–2 M solution of your drug. (hint-how many grams will you need of your drug?) Describe how to prepare this solution from the pure drug and deionized water.  Analytical balances and volumetric flasks are available to you. (Assume that your drug dissolves in water, at least to the extent necessary for this problem.) Use complete sentences in your description of the solution preparation process. A patient is given 2.0mL of a 3.00% (m/v) solution of your drug, how many milligrams of the drug did they receive? What is the molarity of a 3.00% (m/v) solution of your drug?

taprect number of significant figures. A. Precipitation of CaC,O4H,O from the Calculation Zone Salt Mixture mil o 3. Mass of salt mixture (g) Data Analysis, 1. 0.879 4. Mass of filter paper (g) 1.896 5. Mass of filter paper and CaC,O4•H2O (g) рaper 2.180 6. Mass of air-dried CaC,O4•H,O (g) B. Determination of Limiting Reactant Data Analysis, 3. 1. Limiting reactant in salt mixture CaCl, 2H,O 2. Excess reactant in salt mixture Data Analysis e cxbcipuu 1. Moles of CaC,O,'H,O precipitated (mol) Data Analysis, 4. Show calculation. 2. Moles of limiting reactant in salt mixture (mol) 20 See equation 8.1. 3. Mass of limiting reactant in salt mixture (g) Show calculation. trotanjl Data Analysis, 5. 4. Mass of excess reactant in salt mixture (g) Equals mass of salt mixture minus mass of limiting reactant. Show calculation. 5. Percent limiting reactant in salt mixture (%) Show calculation. 6. Percent excess reactant in salt mixture (%) rtc beccib For Trials 2 and 3, the percent CaCl,-2H,O in the…

1.A 0.3256 gram sample sodiun oxalate ( GEW= 67) was used for the standardization of KMn04 and required 35.56 mL. What is the Normality of KMn04?