6 NaOH + 2 Al ---> 2 Na3AlO3 + 3 H2
How many moles of NaOH are required to produce 3 g of hydrogen?
Convert 3 g H2 to moles. #moles = grams/molar mass.
Convert moles H2 to moles NaOH using the coefficients in the balanced equation. You're there.
To determine the number of moles of NaOH required to produce 3 g of hydrogen gas, we need to use the balanced chemical equation and the molar mass of NaOH.
From the given balanced equation:
6 NaOH + 2 Al ---> 2 Na3AlO3 + 3 H2
The coefficient ratio between NaOH and H2 is 6:3, which simplifies to 2:1.
Now we need to calculate the molar mass of NaOH:
Na (sodium) has a molar mass of approximately 23 g/mol.
O (oxygen) has a molar mass of approximately 16 g/mol.
H (hydrogen) has a molar mass of approximately 1 g/mol.
The molar mass of NaOH can be calculated as follows:
NaOH = (23 g/mol) + (16 g/mol) + (1 g/mol) = 40 g/mol.
To find the number of moles of NaOH required to produce 3 g of H2, we can use the following formula:
moles = mass / molar mass
moles of NaOH = 3 g / 40 g/mol
moles of NaOH = 0.075 mol.
Therefore, approximately 0.075 moles of NaOH are required to produce 3 g of hydrogen gas.
To find out how many moles of NaOH are required to produce 3 g of hydrogen, we need to use the balanced chemical equation provided.
The balanced equation is:
6 NaOH + 2 Al --> 2 Na3AlO3 + 3 H2
From the equation, we can see that for every 6 moles of NaOH, we get 3 moles of H2.
To calculate the moles of NaOH needed, we can use the following steps:
1. Find the molar mass of NaOH:
The molar mass of NaOH is the sum of the atomic masses of its constituent elements: Na (22.99 g/mol) + O (16.00 g/mol) + H (1.01 g/mol).
So, the molar mass of NaOH is 22.99 g/mol + 16.00 g/mol + 1.01 g/mol = 39.00 g/mol.
2. Calculate the moles of H2:
We are given that the mass of hydrogen (H2) is 3 g.
To find the moles of H2, we divide the mass by the molar mass of H2.
Moles of H2 = mass of H2 / molar mass of H2
Moles of H2 = 3 g / 2.02 g/mol (molar mass of H2)
Moles of H2 ≈ 1.48 mol
3. Determine the moles of NaOH:
Since the ratio of NaOH to H2 is 6:3 in the balanced equation, the moles of NaOH required would be half the moles of H2.
Moles of NaOH = 1/2 * Moles of H2
Moles of NaOH = 1/2 * 1.48 mol
Moles of NaOH ≈ 0.74 mol
Therefore, approximately 0.74 moles of NaOH are required to produce 3 g of hydrogen.