Weekly Check-In Quiz (June 1-5)

Left to sit, hydrogen peroxide slowly decomposes to form water and oxygen. Which of the following shows a correctly balanced reaction for this process?

• H₂O₂ → H₂O + O₂
• H₂O₂ → H₂O + 2 O₂
• 2 H₂O₂ → 2 H₂O + O₂
• 2 H₂O₂ → H₂O + O₂

Balance the following reaction. Record your four-digit balancing coefficients. (Note: include the coefficient of "1" for those substances without a coefficient)

Balance the following reaction. Record your three-digit balancing coefficients. (Note: include the coefficient of "1" for those substances without a coefficient)

Balance the following reaction. Record your four-digit balancing coefficients. (Note: include the coefficient of "1" for those substances without a coefficient)

Aluminum hydroxide can be produced by combining Potassium hydroxide with Aluminum sulfate in the presence of a large amount of water. The proper 𝘂𝗻𝗯𝗮𝗹𝗮𝗻𝗰𝗲𝗱 reaction is:

• KOH + Al₂(SO₄)₃ → K₂SO₄ + Al(OH)₃
• KOH + AlSO₄ → K₃SO₄ + Al(OH)₃
• KOH + Al₂S₃ → K₂S + Al(OH)₃
• KOH + AlS → K₂S₃ + Al(OH)₃

In the lab, you observed a solution of copper(II) sulfate reacting with a solution of sodium hydrogen carbonate. Write a 𝐛𝐚𝐥𝐚𝐧𝐜𝐞𝐝 𝐜𝐡𝐞𝐦𝐢𝐜𝐚𝐥 𝐞𝐪𝐮𝐚𝐭𝐢𝐨𝐧 for this reaction, and classify the 𝐭𝐲𝐩𝐞 𝐨𝐟 𝐜𝐡𝐞𝐦𝐢𝐜𝐚𝐥 𝐫𝐞𝐚𝐜𝐭𝐢𝐨𝐧. (3 marks!)

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Which of the following represents a complete balanced chemical equation for the reaction below?

• FeCl₃(s) → Fe(s) + Cl₃(g)
• 3 FeCl₃(s) → Fe₃(s) + 9 Cl(g)
• FeCl₃(s) → Fe(s) + 3 Cl(g)
• 2 FeCl₃(s) → 2 Fe(s) + 3 Cl₂(g)

Balance the following reaction. Record your four-digit balancing coefficients. (Note: include the coefficient of "1" for those substances without a coefficient)