Question

If a student weighs out 0.482 grams of aluminum foil and dissolves it in KOH solution,...

If a student weighs out 0.482 grams of aluminum foil and dissolves it in KOH solution, how many moles of aluminum metal react?

How many moles of KOH are necessary to react with the aluminum metal?

Calculate the number of moles of KOH in 13.0 mL of 3.0 M KOH solution?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

2Al(s) + KOH + 6H2O -------------> 2KAl(OH)4 + 3H2

no of moles of Al = W/G.A.Wt

                              = 0.482/27   = 0.0178moles

no of moles of KOH = molarity * volume in L

                                  = 3*0.013   = 0.039 moles

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1- A student weighs out a 11.8 g sample of copper(II) acetate, transfers it to a...
1- A student weighs out a 11.8 g sample of copper(II) acetate, transfers it to a 300 mL volumetric flask, adds enough water to dissolve it and then adds water to the 300 mL tic mark. What is the molarity of Cu(CH3COO)2 in the resulting solution? 2- How many moles of potassium hydroxide, KOH, are there in 257 mL of a 0.158 M solution? 3- A student wants to prepare a solution of zinc acetate with a known molarity. How...
A student reacts 0.506 grams of aluminum with excess KOH and H2O according to reaction one...
A student reacts 0.506 grams of aluminum with excess KOH and H2O according to reaction one from the lab manual. Enter your answers in numerical format How many moles of aluminum was reacted? _______ moles Al How many moles of K[Al(OH)4] will theoretically be produced? _______ moles K[Al(OH)4]
A student reacts 0.506 grams of aluminum with excess KOH and H2O according to reaction one...
A student reacts 0.506 grams of aluminum with excess KOH and H2O according to reaction one from the lab manual. Enter your answers in numerical format How many moles of aluminum was reacted? _______ moles Al How many moles of K[Al(OH)4] will theoretically be produced? _______ moles K[Al(OH)4] Reaction one is 2Al + 2KOH + 6H2O = 2K[Al(OH)4] + 3H2. I have already tried converted 0.506 grams of Al to moles and got the answer 0.019, but it is still...
How many grams of aluminum sulfite will be formed from 225mL of a 0.15M solution of...
How many grams of aluminum sulfite will be formed from 225mL of a 0.15M solution of aluminum hydroxide in an excess of sulfurous acid? a) how many moles of aluminum hydroxide are present in 225 mL of a 0.15 M solution? b) What is the molar ratio of aluminum hydroxide to aluminum sulfite? c) How many moles of aluminum sulfite will be produced? d) What is the molar mass of aluminum sulfite? e) How many grams of aluminum sulfite will...
A student dissolves 0.326 g of a powdered antacid in 32.36 mL of 0.1034 M HCl....
A student dissolves 0.326 g of a powdered antacid in 32.36 mL of 0.1034 M HCl. The student boils the mixture and then allows it to cool. Lastly, the student adds phenolphthalein indicator to the mixture. 1) Calculate the total number of moles of H+ added to the antacid. 2)Suppose 11.72 mL of 0.1506 M NaOH is required to turn the solution from colorless to pale pink. Calculate the total moles of OH- added. 3) Calculate the difference between total...
Mellissa dissolves 26. grams of NaF with water to make a 199. mL solution. What is...
Mellissa dissolves 26. grams of NaF with water to make a 199. mL solution. What is the molarity of the solution? There are 1,000 mL in 1 L. Tamara has 107 g of a NaCl solution that has concentration of 4.5 % NaCl (m/m). How many grams of NaCl are dissolved in that solution?
How many grams of 4.15% (w/w) solution of KOH in water is needed to neutralize completely...
How many grams of 4.15% (w/w) solution of KOH in water is needed to neutralize completely the acid in 13.1 mL of 0.385 M H2SO4?
A 0.250-g sample of a magnesium-aluminum alloy dissolves completely in an excess of HCl(aq). When the...
A 0.250-g sample of a magnesium-aluminum alloy dissolves completely in an excess of HCl(aq). When the liberated H2(g) is collected over water at 29 ∘C and 752 torr, the volume is found to be 345 mL . The vapor pressure of water at 29 ∘C is 30.0 torr. A) How many moles of H2 can be produced from x grams of Mg in magnesium-aluminum alloy? The molar mass of Mg is 24.31 g/mol. B) How many moles of H2 can...
a particular sample of a zinc-aluminum alloy weighs 3.00 g and has mass percentages of 72.5%...
a particular sample of a zinc-aluminum alloy weighs 3.00 g and has mass percentages of 72.5% Zn and 27.5% Aluminum. a) How many moles of each element is in the alloy sample? b) How many theoretical moles of H2(g) will be produced by the reaction of HCl (aq) with each metal and what will be the total number of moles produced? c) How many actual moles of H2(g) will be produced by the reaction of HCl (aq) with each metal...
A student dissolves 0.326 g of a powdered antacid in 32.36 mL of 0.1034 M HCl....
A student dissolves 0.326 g of a powdered antacid in 32.36 mL of 0.1034 M HCl. The student boils the mixture and then allows it to cool. Lastly, the student adds phenolphthalein indicator to the mixture. Suppose 11.72 mL of 0.1506 M NaOH is required to turn the solution from colorless to pale pink. Calculate the total moles of OH- added.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT