Final answer:
The number of iodine tablets required for purifying 2 quarts of cloudy water can be double the amount suggested for clear water. However, one should always refer to the manufacturer's instructions for precise dosage and instructions.
Step-by-step explanation:
When purifying water under field conditions, especially if the water is cloudy, it is important to ensure that the right amount of purification agent is added to make the water safe to drink. If using iodine tablets, it is generally recommended to use a higher dose in cloudy water compared with clear water. However, since the specific number of iodine tablets might vary by product instructions or field conditions, it's crucial to follow the guidelines provided by the iodine tablet manufacturer. Usually, for 2 quarts (approximately 1.9 liters) of cloudy water, one might need to use more than the standard amount for clear water. As a general rule of thumb, doubling the number of tablets recommended for clear water is a common practice, though one should consult the specific instructions. Therefore, if the guideline suggests one tablet for every quart of clear water, you would then use four tablets for 2 quarts of cloudy water. Remember to let the iodine work for the required amount of time before consuming the treated water.