A mixture of KClO3 and KCl with a mass of 0.950 g was heated to produce...

A mixture of KClO₃ and KCl with a mass of 0.950 g was heated to produce O₂. After heating, the mass of residue was 0.660 g. Assuming all the KClO₃ decomposed to KCl and O₂, calculate the mass percent of KClO₃ in the original mixture.

% KClO₃

Solutions

Expert Solution

eqn: 2KClO3 ----> 2KCl + 3O2

moles of O2 lost = (0.950 g - 0.660g) / (MW O2 g/mole) = 0.29/32= 9.0625*10^-3 mol

g KClO3 = (2 moles KClO3/3 moles O2) * moles O2 * MW KClO3 (122.55 g/mole) = 0.74 g

% KClO3 = 100% * 0.74g KClO3 / 0.950 g = 77.94 %

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

A mixture of KClO3 and KCl with a mass of 0.950 g was heated to produce...

A mixture of KClO3 and KCl with a mass of 0.950 g was heated to produce O2. After heating, the mass of residue was 0.840 g. Assuming all the KClO3 decomposed to KCl and O2, calculate the mass percent KClO3 in the original mixture.

7. You are given 2.263 g of a mixture of KClO3 and KCl. When heated, the...

7. You are given 2.263 g of a mixture of KClO3 and KCl. When heated, the KClO3 decomposes to KCl and O2, 2 KClO3 (s) → 2 KCl (s) + 3 O2 (g), and 632 mL of O2 is collected over water at 20 °C. The total pressure of the gases in the collection flask is 736 torr. What is the weight percentage of KClO3 in the sample? The formula weight of KClO3 is 122.55 g/mol. The vapor pressure of...

When heated, KClO3 decomposes into KCl and O2. 2 KClO3 -------------------> 2 KCl + 3O2 If...

When heated, KClO3 decomposes into KCl and O2. 2 KClO3 -------------------> 2 KCl + 3O2 If this reaction produced 70.5 g of KCl, how much O2 was produced ( in grams)?

When heated, KClO3 decomposes into KCl and O2. KCLO3 = 2KCL + 3O2 If this reaction...

When heated, KClO3 decomposes into KCl and O2. KCLO3 = 2KCL + 3O2 If this reaction produced 14.1 g of KCl, how much O2 was produced (in grams)?

If 100 grams of KClO3 are heated to form KCl and O2 according to the equation...

If 100 grams of KClO3 are heated to form KCl and O2 according to the equation KClO3 → KCl + O2 a. How many moles of KClO3 reacted? b. How many moles of KCl are formed? c. How many grams of KCl are formed? d. how many moles of O2 are formed? e. How many grams of O2 are formed?

When heated, KClO3 decomposes into KCl and O2. 2KClO3 ----> 2KCl + 3 O2 If this...

When heated, KClO3 decomposes into KCl and O2. 2KClO3 ----> 2KCl + 3 O2 If this reaction produced 95.9 g KCl, how many grams of O2 were produced?

A mixture of 1.374 g of H2 and 70.31 g of Br2 is heated in a...

A mixture of 1.374 g of H2 and 70.31 g of Br2 is heated in a 2.00 L vessel at 700 K . These substances react as follows: H2(g)+Br2(g)⇌2HBr(g) At equilibrium the vessel is found to contain 0.566 g of H2. 1A) Calculate the equilibrium concentration of Br2 1B) Calculate Kc. 1C) Calculate the equilibrium constant Kp for this reaction, given the following information (at 299 K ): 2NO(g)+Br2(g)⇌2NOBr(g) Kc=1.8 2NO(g)⇌N2(g)+O2(g) Kc=2.3×10^30 Thank you in advance!

A mixture of 1.397 g of H2 and 70.76 g of Br2 is heated in a...

A mixture of 1.397 g of H2 and 70.76 g of Br2 is heated in a 2.00 L vessel at 700. K. These substances react according to H2(g) + Br2(g) ↔ 2 HBr(g). At equilibrium the vessel is found to contain 0.592 g of H2. (a) Calculate the equilibrium concentrations of H2, Br2, and HBr. (b) Calculate Kc.

A 0.9140 g sample of a mixture of NaCl and KCl is dissolved in water, and...

A 0.9140 g sample of a mixture of NaCl and KCl is dissolved in water, and the solution is then treated with an excess of AgNO3 to yield 1.943 g of AgCl. Calculate the percent by mass of each compound in the mixture.

A 0.9000 g sample of a mixture of NaCl and KCl is dissolved in water, and...

A 0.9000 g sample of a mixture of NaCl and KCl is dissolved in water, and the solution is then treated with an excess of AgNO3 to yield 1.923 g of AgCl. Calculate the percent by mass of each compound in the mixture. ____% mass of NaCl ____% mass of KCl

Subjects