Answer:
None
Step-by-step explanation:
A high pH is caused by an excess of hydroxide over hydrogen ions.
Hydroxide ions are so small that they pass through the pores of an ordinary filter.
Thus, ordinary filtration has no effect on the pH of water.
Answer:
- First of all, think the reaction:
4Al + 3O₂ → 2Al₂O₃
- Afterwards, determine the ratio of reactants (4:3)
<u>4</u>Al + <u>3</u>O₂ → 2Al₂O₃
- Convert the mass of Al into moles, by dividing mass / molar mass
48 g / 26.98 g/m = 1.78 mol
- Make a rule of three to determine the moles of O₂
4 mol of Aluminum react with 3 mol of oxygen, so
1.78 mol of Al, will react with (1.78 . 3) / 4 = 1.33 mol of O₂
- Finally, convert the moles in mass like this:
Mol . molar mass = mass → 1.33 mol . 32 g/m = 42.7 grams
Explanation:
Reaction
4Al + 3O₂ → 2Al₂O₃