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CHM 2045C Chapter Notes - Chapter 4: Equivalence Point, Lead, Perchlorate

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emeraldkangaroo470

22 Mar 2018

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How much sulfur (s8) is formed when 5. 00 g di-hydrogen sulfide are mixed with. We do this by multiplying by the ratio of h2s: so2: 0. 147 mol h2s x (8 mol so2 / 16 mol h2s) = 0. 0735 mol. So2: now, we subtract the initial amount of mols we had from the beginning of the problem (5g so2 / 64g so2) = . 078 mol so2 (64g = molar mass so2) and the amount that was just used (0. 0735: 0. 078-0. 0735 = 0. 0045 mol so2. Theoretical yield: the maximum amount of product that can be obtained in a reaction. Actual yield: amount of product that is obtained from a reaction. Is always less than theoretical yield, and is always less than 100: percent yield = (actual yield)/(theoretical yield) x 100% Sio2 reacts with solid c to form liquid silicon and carbon monoxide gas. 155. 8 kg of sio2 is allowed to react with 78. 3 kg of c to produce 66. 1 kg of silicon.

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Related Questions

What is the oxidation state assigned to Mn in potassium permanganate, KMnO₄? (Recall that answers must be numbers, that is, F is -1 not 1- in HF.)

What is the oxidation state assigned to O in hydorgen peroxide, H₂O₂?

What is the oxidation state assigned to B in B(OH)₃?

What is the oxidation state assigned to N in the nitrite ion, NO₂^-?

What is the oxidation state assigned to N in NH₂^-?

What is the oxidation state assigned to Cr in zinc dichromate, ZnCr₂O₇?

What is the oxidation state assigned to Xe in XeO₂F₂?

What is the oxidation state assigned to Xe in XeO₃F₂?

Easy: Complete and balance the following redox reaction in acid solution:

Cl₂(g) + Br^-(aq) ? Cl^-(aq) + Br₂(l)

For the balanced oxidation half-reaction, how many electrons are produced? How many bromide ions are there? (Always use smallest integer coefficients.)

Choose at least one answer.

	a. 1 e^-
	b. 2 e^-
	c. 1 Br^-
	d. 2 Br^-

How many chlorine molecules are in the balanced equation?

Medium: Complete and balance the following redox reaction in acid solution:

Cu(s) + NO₃^-(aq) ? NO(g) + Cu²⁺(aq)

For the balanced reduction half-reaction, how many electrons are needed? How many H⁺ ions are there?

Choose at least one answer.

	a. 1 e^-
	b. 2 e^-
	c. 3 e^-
	d. 4 e^-
	e. 1 H⁺
	f. 2 H⁺
	g. 3 H⁺
	h. 4 H⁺

How many H⁺ ions are in the balanced equation?

(If the H⁺ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.)

Complete and balance the following redox reaction in acid solution:

MnO₄^-(aq) + C₂H₂O₄(aq) ? Mn²⁺(aq) + CO₂(g)

For the balanced oxidation half-reaction, how many electrons are produced? How many H⁺ ions are there?

Choose at least one answer.

	a. 1 e^-
	b. 2 e^-
	c. 3 e^-
	d. 4 e^-
	e. 1 H⁺
	f. 2 H⁺
	g. 3 H⁺
	h. 4 H⁺

How many H⁺ ions are in the balanced equation?

(If the H⁺ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.)

Complete and balance the following redox reaction in basic solution:

ClO^-(aq) + CrO₂^-(aq) ? Cl^-(aq) + CrO₄^2-(aq)

For the balanced oxidation half-reaction, how many electrons are produced? How many OH^- ions are there?

Hint given in the general feedback.

Choose at least one answer.

	a. 1 e^-
	b. 2 e^-
	c. 3 e^-
	d. 4 e^-
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	f. 2 OH^-
	g. 3 OH^-
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How many OH^- ions are in the balanced equation?

(If the OH^- ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.)