Homework 3 - Solutions

rewrite the question in your own words to clarify it, write a useful hint, or explain how you ran out of time. Provide the correct answer Show the calculation and briefly describe the steps Or explain the knowledge and decision-making process At the very end, write a paragraph addressing any knowledge/skill gaps, deficiencies in how you approach studying for the class, and specifics on how you will improve

Calculate the number of mercury (Hg) atoms in an aqueous solution with a volume of 1.00 L and a concentration of 1.0 ppb.

Each rov. . che table below describes an aqueous solution at about 25 °C. Complete the table. That is, fill in any missing entries in the second and third columns. Be sure each entry you write includes the correct number of significant digits. [1,0"] solution pH x10 -9 mol/L alo A 4.9 х 10 | mol/L B 6.24 -4 2.4 x 10 mol/L

Help with the last questions on the bottom please.

How many moles of H2SO4 and KOH are consumed? (Use at least three sig figs)

An aqueous solution at 25 °C has a H,0 concentration of 6.7 ×10 M. Calculate the OH concentration. Be sure your answer has 2 significant digits. -8 M x10 2022 McGraw Hill LLC. Al Rights Reserved. Terms of Use Privacy Center Accessibility 7:11 AM I Don't Know Submit 47/2022 W 80 F Cloudy DELL PgUp PgDr Delete PrtScr Insert F11 F12 F10 F9 F8 F6 F7 Num F5 F4 Lock F3 F2 Backspace F1 Esc & %3D Fn # * 00 %24

Aa.4.

What are the Volumes of HCl from the 3 Trials?

TITRIMETRIC DATA SAMPLE: CANE VINEGAR % acidity in label: 4.5% %purity of KHP: 99.80% FORMULA WEIGHT of KHP: 204.22 g/mol STANDARDIZATION OF NaOH SOLUTION TRIAL 1 TRIAL 2 TRIAL 3 Weight of KHP, g 0.1012 0.1004 0.09987 Initial volume of NaOH, mL 5.00 10.01 Final volume of NaOH, mL 4.95 9.99 14.93 Molarity of NaOH Average Molarity of NaOH ANALYSIS OF ACETIC ACID IN A VINEGAR SAMPLE TRIAL 1 TRIAL 2 TRIAL 3 Volume of vinegar, mL Initial volume of NaOH, mL 1.00 1.00 1.00 14.98 22.90 30.87 Final volume of NaOH, mL 22.84 30.77 38.75 Molarity of acetic acid Average molarity of acetic acid ANALYSIS OF CARBONIC ACID IN A SODA SAMPLE TRIAL 1 TRIAL 2 TRIAL 3 Volume of soda, mL 20.0 20.0 20.0 Initial volume of NaOH, mL 20.20 22.05 23.93 Final volume of NaOH, mL 22.03 23.89 25.8 Molarity of carbonic acid Average molarity of carbonic acid

Data of HCl Trial 1: volume of HCl =0.82l Volume of NaOH =22.1ml Trial 2: volume of HCl=0.821ml Volume of NaOH = 22.2ml Trial 3: volume of HCl= 0.821ml Volume NaOH = 22.7ml 1) calculate the molarity of HCl for each trial and find the average molarity.

Pls help ASAP ON ALL ASKED QUESTIONS PLS PLS

Are my equivalence point calculations correct? I got a different Veq than the end point on my graph.

What is the molarity of an aqueous solution that contains 0.0720 g C2H6O2 per gram of solution . The density of the solution is 1.04 g/mL X STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 1.04 62.08 6.022 x 1023 0.0720 1.21 x 10-3 4650 1.12 1000 1.21 1 0.001 g C2H.O2 mol C2H6O2 g C2H&Oz/mol g solution/mL mL solution g C2H6O2/g solution M C2H6O2 L solution g solution

Data in first picture and questjons in second

A particular plant food has a label that reads 8-12-4.  The second number refers to the % P2O5 the plant food contains. Gravimetric analysis was done on a 10.0 g sample of plant food and you removed the phosphorus according to the equation below:  5H20(l) + HPO42- (aq)+ NH4+(aq) +Mg2+(aq)+OH-(aq)      __>       MgNH4PO4 . 6 H2O(s)   If you obtain 4.75 g of precipitate,  Calculate the experimaental  % P2O5   .  Is it close to the label reading of 12%?

Number two plz

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I Review | Constants | Periodic Table Calculate the [H3O*] of each aqueous solution with the following [OH ]. Part A baking soda, [OH]= 2.1 × 10-6 M Express your answer using two significant figures. [H3O+] = M Submit Request Answer Part B blood, [OH ]= 2.4 × 10-7 M Express your answer using two significant figures. ΑΣΦ ? [H3O*] = M

Each row of the table below describes an aqueous solution at about 25 °C. Complete the table. That is, fill in any missing entries in the second and third columns. Be sure each entry you write includes the correct number of significant digits. [4,0"] solution pH x10 - 8 mol/L A 7.8 X 10 В ||mol/L 8.19 C 0.0031 mol/L

Based on the previously asked question and it's data, please help fill in the rest of the table. Show your work. The molarity of KMnO4 is 0.0101M.

Each row of the table below describes an aqueous solution at about 25 °C. Complete the table. That is, fill in any missing entries in the second and third columns. Round your entries for H,O to 2 significant digits, and your entries for pH to 2 decimal places. [1,0] solution pH x10 12 A 7.1 x 10 mol/L mol/L 0.090 8.4 x 10 mol/L

1a) 0.1% = ? ug/ml? Only include the number and not any units b) What is the concentration of your stock in ug/ml? Only include the number and not any units c`The molecular weight of tartrazine is 534.4 g/mole. What is the concentration of your stock solution in mM? Be sure to give your answer in milliMolar to TWO decimal places. d)What dilution of your stock do you need to get the first standard (100 ug/ml)? Express as 1:x, where x is the fold dilution needed.

Pharmac is a pharmaceutical company that manufactures various antacids used for symptomatic relief of heartburn. Yesterday, a batch of 250 mg calcium carbonate tablets (Brand Name: Calcarb) has been manufactured and is now up for quality control testing. Samples were transmitted to your laboratory for testing. As a laboratory analyst, you are tasked to perform the Acid Neutralizing Capacity Test. This test simulates the action of the antacid in the stomach and determines the number of milliequivalents of HCl that the antacid can neutralize. For Calcarb to pass the test, it must be able to neutralize NLT 5 mEq of HCl. Answer all subsequent questions. 1. In this test, the procedure requires that a 1 Normal Hydrochloric acid (HCl) be used. To perform the test, you need to prepare 500 mL of this acid. The available stock of HCl in the lab is concentrated HCl with a percentage concentration of 37.0% w/w. Calculate how many mL of this stock HCl must be used to prepare 500 mL of IN HCl. The…

9:24 PM Mon Feb 21 * 65% A openstax.org Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration). Concentrations may be quantitatively assessed using a wide variety of measurement units, each convenient for particular applications. Molarity (M) is a useful concentration unit for many applications in chemistry. Molarity is defined as the number of moles of solute in exactly 1 liter (1 L) of the solution: mol solute M = L solution EXAMPLE 3.14 Calculating Molar Concentrations A 355-mL soft drink sample contains 0.133 mol of sucrose (table sugar). What is the molar concentration of sucrose in the beverage? Solution Since the molar amount of solute and the volume of solution are both given, the molarity can be calculated using the definition of molarity. Per this definition, the solution volume must be converted from mL to L: mol solute 0.133 mol M = = 0.375 M L solution 355 mL × 1L…