# Chemistry

posted by .

I will do an experiment that includes 4 grams of aluminum hydroxide and iron (III) oxide mixture, where 75% of it is Al(OH)3, and 15 ml of water and 25 ml of 2M KOH will be added and then boiled so that the Al(OH)3 dissolves. It will be filtered and then sulfuric acid will be added. How can I calculate the volume of sulfuric acid that I will need? What does the chemical equation include?

• Chemistry -

75% of the 4 g mixture will be Al(OH)3 or 3 g.
Al(OH)3 + OH^- ==> Al(OH)4^-
Al(OH)4^- + 2H2SO4 ==> Al^3+ + 4H2O + 2SO4^2-

• Chemistry -

What about the iron (II) oxide? and the KOH?

• Chemistry -

If the iron oxide is in solution then it will form Fe(OH)3 when KOH is added but adding excess KOH will NOT dissolve Fe(H)2 as it does Al(OH)3. That's how iron and aluminum are separated industrially; i.e., ppt both as the hydroxide, add excess to dissolve the Al, separate, then add acid to reppt the Al. But the way your problem is worded, the iron oxide is never placed in soln and I don't think appreciable iron oxide will dissolve in KOH. I think all you are doing is dissolving the Al(OH)3 in KOH and filtering the solution to remove the iron oxide.

## Similar Questions

1. ### Chemistry

The thermite reaction is a very exothermic reaction; it has been used to produce liquid iron for welding. A mixture of 2 mol of powdered aluminum metal and 1 mol of iron(III) oxide yields liquid iron and solid aluminum oxide. How many …
2. ### chemistry

The thermite reaction is a very exothermic reaction; it has been used to produce liquid iron for welding. A mixture of 2 mol of powdered aluminum metal and 1 mol of iron(III) oxide yields liquid iron and solid aluminum oxide. How many …
3. ### chemistry

The thermite reaction is a very exothermic reaction; it has been used to produce liquid iron for welding. A mixture of 2 mol of powdered aluminum metal and 1 mol of iron(III) oxide yields liquid iron and solid aluminum oxide. How many …
4. ### Chemistry

Aluminum metal and Iron(III) oxide react to give aluminum and iron metal. What is the maximum amount of Iron that can be obtained from a reaction mixture containing 2.5 grams of aluminum and 9.5 grams of Iron(III) oxide?
5. ### Science

Thermite is a mixture of iron(III) oxide and aluminum powders that is used in some countries to weld railroad tracks. It is a spectacular reaction to yield solid aluminum oxide that floats on the molten iron. When cooled, the iron …
6. ### Chemistry

Iron (III) hydroxide is soluble in acid: Fe(OH)3(s)3H^+(aq)-->Fe^3^+(aq)+3H2O(l) a. How many milliliters of 1.00 M HCl are needed to dissolve 1.00 g of iron (III) hydroxide?
7. ### Chemistry

Over the years, the thermite reaction (mixing of solid iron (III) oxide with aluminum metal) has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. A. Write a balanced equation representing …
8. ### chemistry

Solid iron(III) hydroxide decomposes to produce iron(III) oxide and water vapor. 1.09 L of water vapor is produced at STP. How much iron(III) hydroxide was used?
9. ### Chemistry

Aluminum metal reacts with iron (III) oxide to produce aluminum oxide and iron metal. Answers the following three questions note: you will need to write a balanced equation to answer them Al: 26.9 amu Fe: 55.8 amu O: 16 amu 1 How many …
10. ### Chemistry

Iron (III) Oxide reacts with Aluminum to form Aluminum Oxide and Iron. If I have 255 g of Aluminum and unlimited Iron (III) oxide, how many grams of Iron will form?

More Similar Questions