Question 5 (2 points) What is the minimum quantity of 5.58 M KOH in mL that...
What is the minimum quantity of 5.98 M KOH in mL that would be required for complete reaction with 1.4406 g of aluminum foil? Use the reaction involving Al metal and KOH with water for your mole to mole ratio. It can be found in your lab manual.
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number of significant digits. 1. What are the hazards associated with potassium hydroxide and sulfuric acid solutions? They both react strongly w/ Srong auds and will cai thiough most things line our cluthes and when mixed urth metals Such äs aluminum 'they form frammabie and explosir hydrogen gas 2. Reaction equations and molar ratios a. Write out Equation 1 and 2. What are the mole to mole ratios between aluminum metal and the products that...
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Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine the concentration of aspirin in an unknown sample. The absorbance spectrum of the highest concentration standard [Fe3+, SA) prepared is given below. What wavelength should be used to create the calibration curve for the experiment? Explain your reasoning. 0.14 Absorbance 0.02 250 300 450 500 350 400 Wavelength (nm) Wavelength Explain your reason briefly. b) In this experiment an aspirin tablet was placed in...
Question 13 (2 points) How many milliliters of 1.50 M KOH solution are needed to supply 0.125 mole of KOH? 0.0833 mL 0.188 mL 83.3 mL 12.0 mL
Piece +5 (1 pt) 100.00 mL of 1.0 MPb(NO3)2 is added to 150.00 mL of 0.215 M KOH. What is the concentration of KOH? Puzzle #1 (2 pt.) I mix 100.0 mL of 1.00 M Pb(NO3) with 150.0 mL of 0.215 M KOH. What mass of solid product do I expect to recover? Bonus (1 pt): I actually collected 25 g of product. What was the percent yield of my reaction?
Calculate the moles of KOH added to the reaction mixture. We use 12 mL of 4 M KOH and 15 mL of 6 M H2SO4 for this experiment. Type your numerical answer without units. HINT: You know the volume and molarity (moles/L) of KOH used. Use dimensional analysis.
Post La DUI LUI U UUDLUNS What is the biggest factor that causes vields of alum in this experiment to be low? using too much Hasoy whold cause the yield to be in 2. A student reacted 1.01 g of Al with 25.0 mL of 2.00 M KOH according to the following reaction: 2Al(s) + 2KOH(aq) +6H2O(0) ► 2KAI(OH)4 + 3H2(g) a. How many moles of KOH were required to react with all of the aluminum? b. How many moles...
If 5.00 ml of 0.525 M HClO4 are titrated with 29.31 mL of KOH, what is the concentration in Molarity of the KOH? Be sure to express you answer with the appropriate number of significant figures. Type your answer without units.
HaPO4(aq) + KOH(aq) → KsPOa(ag) + H2O(/) Consider the unbalanced equation above. What is the concentration of the original KOH solution if 81.5 mL of the KOH solution reacts with 2.85 g of H3PO4? AICI(aq) NaOH(ag) → Al(OH)3(s) + NaCl(aa) Consider the unbalanced equation above. What volume of 0.150 M sodium hydroxide is needed to react with 82.5 mL of 0.190 M aluminum chloride? mL CrCls(s) + AgNO3 (aq) → AgCl(s) + Cr(NO3)3(aq) A 0.830 g sample of impure CrCl3...
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Question 33 (8 points) A 28.7 mL sample of KOH required 31.3 mL of 0.118 M H2SO3 to neutralize it. How many grams of KOH were in the original sample? 2KOH + H2SO3 ----> K2503 + 2H20 Please leave a space between the number and unit in your answer.