Final answer:
When water appears cloudy, it can be purified by adding iodine tablets. For a one-quart canteen, typically one iodine tablet is added. The water should become clear after following the recommended instructions.
Step-by-step explanation:
When water appears cloudy, it may be an indication of impurities or contaminants. To purify the water, iodine tablets can be added. The number of iodine tablets required depends on the size of the canteen and the concentration of the iodine tablets.
As a general guideline, for a one-quart canteen, you would typically add one iodine tablet. However, it is important to follow the instructions provided with the iodine tablets to ensure the proper dosage.
By adding the iodine tablets and following the recommended instructions, the water should become clear, indicating that the impurities have been treated.