LD50 = 11900 mg/kg
Each Vitamin C tablet is 49% (m/m) ascorbic acid
1 Vitamin C tablet weighs 1.102 g

To determine the LD50 (lethal dose for 50% of subjects) in terms of the number of Vitamin C tablets, we need to follow these steps:

### Step 1: Calculate the mass of ascorbic acid in one tablet.
- Each tablet weighs **1.102 g** and contains **49%** ascorbic acid by mass.
- The mass of ascorbic acid in one tablet:

\[
\text{Mass of ascorbic acid} = 1.102 \, \text{g} \times 0.49 = 0.53998 \, \text{g} \approx 0.540 \, \text{g}
\]

### Step 2: Convert the LD50 to grams.
- The LD50 is **11900 mg/kg**. To express it in grams:

\[
11900 \, \text{mg} = 11.9 \, \text{g/kg}
\]

### Step 3: Calculate the number of tablets that make up the LD50 for a given body weight.
- For a person weighing **X** kilograms, the total mass of ascorbic acid that would reach the LD50 is:

\[
\text{Total mass of ascorbic acid at LD50} = 11.9 \, \text{g/kg} \times \text{X kg}
\]

- Now, the number of Vitamin C tablets required to reach the LD50 is:

\[
\text{Number of tablets} = \frac{11.9 \times \text{X}}{0.540}
\]

### Example for a 70 kg person:
If a person weighs **70 kg**, the total ascorbic acid mass at LD50 would be:

\[
11.9 \, \text{g/kg} \times 70 \, \text{kg} = 833 \, \text{g}
\]

The number of tablets would then be:

\[
\frac{833}{0.540} \approx 1543 \, \text{tablets}
\]

So, a person weighing **70 kg** would need to consume approximately **1543 tablets** to reach the LD50.

Would you like more details or have any questions?

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Here are 5 related questions:
1. What factors might affect the LD50 for ascorbic acid in humans?
2. How does the LD50 value compare to the recommended daily intake of Vitamin C?
3. How is the percentage of a substance like ascorbic acid determined in a compound?
4. What are other vitamins or substances with known LD50 values?
5. How would LD50 values change for different body weights?

**Tip:** Always pay attention to units when dealing with LD50 values to avoid miscalculations.

LD50 = 11900 mg/kg. Each Vitamin C tablet is 49% (m/m) ascorbic acid. 1 Vitamin C tablet weighs 1.102 g.

Learn how to calculate the number of Vitamin C tablets required to reach the LD50 of ascorbic acid. This solution uses key concepts like percentages, proportions, and unit conversions to determine the lethal dose for a person weighing 70 kg. Suitable for high school students studying chemistry and mathematics.

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