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In an atom, there is nucleus in the center and electrons are revolving around it. Protons are…

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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number 20 please!
In the laboratory you dissolve 20.9 g of magnesium sulfate in a volumetric flask and add water to a total volume of 125 mL. What is the molarity of the solution?|| M. What is the concentration of the magnesium cation? What is the concentration of the sulfate anion? M. M.
By titration, it is found that 70.9 mL of 0.160 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution. [HC1] = M Question Source: McQuarrie, Rock, And Gallogly 4e - General Chemistry | Publisher: University Science Books
If this item does not open automatically you can open Data Sheet here = 106106334 Part I. Reaction of Fe³+ and SCN™ Test tube A B C 5 Adding NH3 (aq) 1/1 Action performed Experiment 15 Chemical Equilibrium and Le Châtelier's Principle Adding Fe(NO3)3 (aq) Adding NaSCN (aq) Adding NaNO3(aq) Part II. Reaction of Cu²+ and aqueous NH3 Action performed Mixing CuSO4 and NH3 (aq). Oll y 31 88% + Data Sheet Observations Observations. DELL العال[ O : * 8 CH127 Introductory General Chemistry Laboratory Conclusion Conclusion O Dec 18 8:09 2 3 Р
When a 20.5 mL sample of a 0.372 M aqueous nitrous acid solution is titrated with a 0.483 M aqueous sodium hydroxide solution, what is the pH at the midpoint in the titration? pH = Submit Answer Retry Entire Group 5 more group attempts remaining
+ ■ 3 * 8 W Chapter... G N. 3 ebpage is using significant memory. Closing it may improve the responsiveness of your Mac. = Supporting Materials Periodic Table Additional Materials eBook HK Submit Answer webassign.net Constants and Factors The hydronium ion concentration in a sample of springwater is found to be 7.1x107 M at 15°C. What is the concentration (in M) of hydroxide ions in the springwater? (Kw = 4.57 x 10-15 at this temperature.) M O Supplemental Data E L C a @ + ▸
Can you please answer both questions?
The acidity of a solution is measured by its pH. If (T*] represents the concentration of hydrogen ions (in moles/liter) in the solution, the pH is defined by pH = – log Ht || Suppose a solution has pH = 1.98. (a) Rewrite the logarithmic form of the equation into exponential form. indicates two way equivalence) Click for List - ] – log H+ pH O Click for List Click for List (b) Find Ht, the approximate concentration of hydrogen ions. (Select one) O [H*]= 0.2967 moles/liter [H']~0.5051 moles/liter O [H*]= 0.01047 moles/liter O [H*]~ -0.2967 moles/liter O [H*]=0.03177 moles/liter [H*]= -95.4993 moles/liter O [H*]=3.3708 moles/liter
52 . Calculate the number of moles and the mass of the solute in each of the following solutions: (b) 75.0 mL of 2.2 ×× 10−5 M H2SO4, a sample of acid rain
You are performing an experiment in lab that involves the titration of 25.0 mL of H2SO4 solution. You titrate the acidic solution with 0.8067 M NaOH and the equivalence point is reached by the addition of 17.31 mL of NaOH solution. Using the balanced equation below, calculate the molartity of H2SO4 in the flask. Do NOT include units. 2NaOH(aq) + H2SO4(aq) --> 2H2O(l) + Na2SO4(aq)
help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working
2. A chemistry student is doing a titration lab in D314 and needs to make up 2 liters of NaOH for the class and standardize the NaOH with the organic acid KHP (MW 204.2 g/mol). The instructions say 5 grams/ liter of NaOH pellets which is - 0.1 M by the molar mass of NaOH. The student weighs out 10 grams of NaOH and dissolves it in 2 liters of water. The student then weighs out 0.4120 g of KHP and puts the organic acid in 50 mL of water and adds ~ 3 drops of 1% phenolphthalein indicator. To reach the endpoint (pink) where moles KHP are used up with NaOH, he adds 17.5 mL of the NaOH from the buret. What is the concentration of the NaOH? If he repeats this 2 more times an adds 16.9 mL and 18.2 mL what is the average concentration of the NaOH and the % difference? K