Answer:
HCl is the limiting reactant.
Explanation:
The reactant that yields the lesser number of moles of product is the limiting reactant
Number of moles of MnO2= mass of MnO2/ molar mass of MnO2
Number of moles= 37.7g/86.9368 g/mol= 0.4336 moles
From the reaction equation,
If 1 mole of MnO2 yields 1 mole of chlorine gas
0.4336 moles of MnO2 also yield 0.4336 moles of chlorine gas
For HCl
Number of moles of HCl= mass of HCl/ molar mass of HCl
Number of moles= 46.3g/36.46 g/mol = 1.27 moles of HCl
If 4 moles of HCl yields 1 mole of chlorine gas
1.27 moles of HCl will yield 1.27×1/4 = 0.3175 moles of HCl
Hence HCl is the limiting reactant.
If it's your first encounter with chemistry, your instructor will want you to learn how to use the periodic table<span> to find the atomic mass (</span>atomic weight<span>) of an element. This number usually is given below an element's symbol. Look for the decimal number, which is a </span>weighted average of the atomic masses<span> of all the </span>natural isotopes<span> of an element. </span>
Answer:
5
Explanation:
They all matter unless it is a decimal.
Answer:
Ag₂CrO₄(s) + H⁺(aq) ⟶ 2Ag⁺(aq) + HCrO₄⁻(aq)
Explanation:
Ag₂CrO₄(s) ⇌ 2Ag⁺(aq) + CrO₄²⁻(aq).
Silver chromate is the salt of a strong base (AgOH) and a weak acid (H₂CrO₄).
HCrO₄⁻ is an even weaker acid than H₂CrO₄, so CrO₄²⁻ is a strong base.
Any added H⁺ will immediately combine with the chromate ions according to the reaction
H⁺ + CrO₄²⁻ ⟶ HCrO₄⁻
thereby removing chromate ions from solution.
According to Le Châtelier's Principle, more silver chromate will dissolve to replace the chromate ions that the H⁺ removes.
The overall equation for the reaction is
Ag₂CrO₄(s) ⇌ 2Ag⁺(aq) + <em>CrO₄²⁻(aq)
</em>
<u>H⁺(aq) + </u><em><u>CrO₄²⁻(aq)</u></em><u> ⟶ HCrO₄⁻(aq)
</u>
Ag₂CrO₄(s) + H⁺(aq) ⟶ 2Ag⁺(aq) + HCrO₄⁻(aq)
