Draw resonance structures for $$ \mathrm{CO}^{2-} $$, showing the delocalization of charge using curved arrows. QUESTION 6 Calculate the amount of sed um hydroxide that is needec-to prepare one itre of a 350 molar sodium hydroride solution.

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Certainly! Let's address both parts of your query: 1. **Resonance Structures for $$ \mathrm{CO}^{2-} $$** 2. **Calculation of Sodium Hydroxide Needed for a Sodium Hydroxide Solution** --- ### 1. Resonance Structures for $$ \mathrm{CO}^{2-} $$ Assuming you're referring to the **carbonate ion** ($$ \mathrm{CO}_3^{2-} $$), it exhibits resonance due to the delocalization of electrons. The carbonate ion has three equivalent resonance structures where the double bond between carbon and oxygen is rotated among the three oxygen atoms. **Structure Description:** - **Central Atom:** Carbon (C) - **Surrounding Atoms:** Three oxygen (O) atoms - **Charge Distribution:** Each oxygen carries a -1/3 charge on average in resonance. **Resonance Structures:** 1. **Structure 1:** - Double bond between C and one O. - Single bonds between C and the other two O atoms. - Negative charges on the two single-bonded O atoms. 2. **Structure 2:** - Double bond between C and a different O. - Single bonds between C and the remaining two O atoms. - Negative charges on the two single-bonded O atoms. 3. **Structure 3:** - Double bond between C and the third O. - Single bonds between C and the other two O atoms. - Negative charges on the two single-bonded O atoms. **Curved Arrow Representation:** - **Electron Movement:** The π electrons from the double bond shift to form a double bond with another oxygen, while the single bond electrons shift to accommodate the resonance. ``` O⁻ O O⁻ \ | / C <--> C <--> C / \ \ O⁻ O O⁻ ``` *Due to text limitations, visual representation using curved arrows isn't feasible here. However, each resonance structure can be visualized by moving the double bond and the lone pair electrons among the oxygen atoms in a cyclic manner.* --- ### 2. Calculating the Amount of Sodium Hydroxide Needed **Problem Statement:** Calculate the amount of solid sodium hydroxide (NaOH) needed to prepare **one litre** of a **350 molar (M)** sodium hydroxide solution. **However, there's a consideration to be made:** - A **350 M** solution of NaOH is **physically impossible** because it exceeds the solubility of NaOH in water. Typically, the maximum solubility of NaOH in water at room temperature is about **111 g per 100 mL**, which corresponds to approximately **27.6 M**. Assuming there might be a typo and the intended concentration is **0.350 M**, here's how to perform the calculation: --- **Revised Problem Statement:** Calculate the amount of solid sodium hydroxide (NaOH) needed to prepare **one litre** of a **0.350 molar (M)** sodium hydroxide solution. **Step-by-Step Calculation:** 1. **Understand Molarity (M):** $$ Molarity (M) = \frac{\text{Moles of solute}}{\text{Litres of solution}} $$ 2. **Given:** - Desired Molarity ($$ M $$) = 0.350 M - Volume ($$ V $$) = 1 litre 3. **Calculate Moles of NaOH Needed:** $$ \text{Moles of NaOH} = M \times V = 0.350 \, \text{M} \times 1 \, \text{L} = 0.350 \, \text{moles} $$ 4. **Determine Molar Mass of NaOH:** - Sodium (Na) = 22.99 g/mol - Oxygen (O) = 16.00 g/mol - Hydrogen (H) = 1.01 g/mol $$ \text{Molar Mass of NaOH} = 22.99 + 16.00 + 1.01 = 40.00 \, \text{g/mol} $$ 5. **Calculate Mass of NaOH Needed:** $$ \text{Mass} = \text{Moles} \times \text{Molar Mass} = 0.350 \, \text{moles} \times 40.00 \, \text{g/mol} = 14.00 \, \text{grams} $$ **Conclusion:** To prepare **1 litre** of a **0.350 M** sodium hydroxide solution, you would need **14.00 grams** of solid NaOH. --- **Final Note:** Please verify the intended concentration for the sodium hydroxide solution. If **350 M** was indeed your intended concentration, it would not be feasible due to solubility limitations. For practical laboratory preparations, concentrations are typically kept well below this value. To prepare 1 litre of a 0.350 M sodium hydroxide (NaOH) solution, you need 14.00 grams of solid NaOH.

Draw resonance structures for , showing the delocalization of charge using
curved arrows.
QUESTION 6
Calculate the amount of sed um hydroxide that is needec-to prepare one itre of a
350 molar sodium hydroride solution.

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1. Resonance Structures for

2. Calculating the Amount of Sodium Hydroxide Needed

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Draw resonance structures for , showing the delocalization of charge using curved arrows. QUESTION 6 Calculate the amount of sed um hydroxide that is needec-to prepare one itre of a 350 molar sodium hydroride solution.