posted by .

The problems:

0.0513 grams of Al (Wt. 27.0) was reacted with excess HCI to produce H2 according to the following balanced equation:

2 Al + 6 HCI ---> 2 AlCl3 + 3 H2

a) Determine the number of moles of H2 evolved from that quantity of Al when collected over water?

0.0513g Al x 1 mol Al / 27g Al x 3 mol H2 / 2 Mol Al = 0.00285 mol H2

b) If the volume of gas generated was 75mL and the temp was 27°C , determine the total pressure of the hydrogen gas evolved from the quantity of Al stated above?

PV=nRT --> P = nRT/V

(0.00285)(0.082)(300) / 0.075 = 0.9348

c) The vapor pressure of water at 27°C was 26.7 mmHg, determine the partial pressure of the hydrogen gas collected in mmHg?

And this one I cant find an example in my book so I don't know which formula to follow.

## Similar Questions

1. ### Chemistry

In a lab that I am doing I am having difficulty in determining this: What are two indications that suggest a reaction has taken place when HCI was added to Mg?
2. ### Math

1. Write the balanced chemical equation for the reaction NaOH + HCI --> NaCI + H20 2. Extract the relevant information from the qustion: NaOH v= 30mL, M=0.10 HCI v= 25.0 mL, M=?
3. ### Chemistry

Describe how you would prepare 500 mL of a 0.0400 M solution of HCI from a concentrated soultion of HCI which is 36.5% HCI and has a density of 1.10 g/mL.
4. ### General Chemistry

When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCI(aq) -> KCI(aq) + HCN (g) In a sample of 0.140 grams of KCN is treated with an excess …
5. ### chemistry

im stuck on finding the molarity of a substance and its due tomarrow. someone please help. 5 moles of HCI in two liters. 2 moles of NaOH in 1 liter. 0.5 moles of HCI in one liter. 36 grams of HCI in one liter. thanx, alex
6. ### chemistry

a 25.0ml dsmplr og 0.105M HCI was titrated with 31.5ml of NaOH. What is the concentration of the NaOH I got 0.0834M am I correct HCI + NaOH -----> H20 + NaCl 25.0ml HCI x 1L/1000mlx0.105 mol HCI/1L HCI X 1 mol NaOH/ I mol HCI = …
7. ### Chemistry

3.42 grams of Ba(OH)2 is placed in a flask, dissolved in water, and titrated with an HCI solution. It is found that 25.0mL of the HCI solution is required to just neutralize the Ba(OH)2. What is the molarity of the HCI solution?
8. ### Chemistry

If you weighed out 0.38 grams of calcium and reacted it with excess amount of HCI how many miles of H2 grams would you expect to produce?
9. ### Chemistry

Write balanced reaction for the following metal acid reaction A) Mg and HCI B) Zn and HCI
10. ### Chemistry

In need of help setting up each of these problems. Under the conditions in a laboratory experiment, 0.0513 grams of aluminum (At. Wt.=27.0) was reacted with excess hydrochloric acid to produce hydrogen gas according to the following …

More Similar Questions

Post a New Question