Question

question 6

what is the oxidation state of carbon in the compound \\(\text{na}_2\text{c}_3\text{o}_4\\)?

if the oxidation state is positive just give the number (e.g. enter 1 for +1)

if the oxidation state is negative give the negative number (e.g. enter -1 for -1)

if the oxidation state is zero, enter 0

Explanation:

<pre_analysis>
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"Oxidation State Rules",
"Oxidation Number Calculation"
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"Oxidation Number Calculation"
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<reasoning>

Identify known oxidation states

\[

$$\begin{aligned} &\text{Oxidation state of Na (Group 1 alkali metal)} = +1 \\ &\text{Oxidation state of O (usually in compounds)} = -2 \end{aligned}$$

\]

Set up the charge balance equation

\[

$$\begin{aligned} &2(\text{Na}) + 2(\text{C}) + 4(\text{O}) = 0 \\ &2(+1) + 2(x) + 4(-2) = 0 \end{aligned}$$

\]

Solve for the oxidation state of carbon

\[

$$\begin{aligned} &2 + 2x - 8 = 0 \\ &2x - 6 = 0 \\ &2x = 6 \\ &x = 3 \end{aligned}$$

\]
</reasoning>

<answer>
What is the oxidation state of carbon in the compound \(\text{Na}_2\text{C}_2\text{O}_4\)?

If the oxidation state is positive just give the number (e.g. enter 1 for +1)

If the oxidation state is negative give the negative number (e.g. enter -1 for -1)

If the oxidation state is zero, enter 0

<blank>3</blank>
</answer>

<post_analysis>
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"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Natural Science",
"Chemistry",
"Oxidation Number Calculation"
]
}
</post_analysis>

Answer:

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"Oxidation State Rules",
"Oxidation Number Calculation"
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"Oxidation Number Calculation"
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}
</pre_analysis>

<reasoning>

Identify known oxidation states

\[

$$\begin{aligned} &\text{Oxidation state of Na (Group 1 alkali metal)} = +1 \\ &\text{Oxidation state of O (usually in compounds)} = -2 \end{aligned}$$

\]

Set up the charge balance equation

\[

$$\begin{aligned} &2(\text{Na}) + 2(\text{C}) + 4(\text{O}) = 0 \\ &2(+1) + 2(x) + 4(-2) = 0 \end{aligned}$$

\]

Solve for the oxidation state of carbon

\[

$$\begin{aligned} &2 + 2x - 8 = 0 \\ &2x - 6 = 0 \\ &2x = 6 \\ &x = 3 \end{aligned}$$

\]
</reasoning>

<answer>
What is the oxidation state of carbon in the compound \(\text{Na}_2\text{C}_2\text{O}_4\)?

If the oxidation state is positive just give the number (e.g. enter 1 for +1)

If the oxidation state is negative give the negative number (e.g. enter -1 for -1)

If the oxidation state is zero, enter 0

<blank>3</blank>
</answer>

<post_analysis>
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"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Natural Science",
"Chemistry",
"Oxidation Number Calculation"
]
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