Question

Помогите с химии Для дезиинцекции ран применяют йодную настойку,представляющую собой 10%ный раствор йода в спирте.Сколько граммов кристаллического йода и спирта следует взять для приготовления 200 г йодной настойки

Answer 1

Дано:
w=10%
m(p-pa) = 200г
m(йода) = ?
m(спирта) = ?

Решение:
1) m(йода)=(10%*100г)\100%=20 (г) - m(йода)
2) m(спирта)=m(p-pa)-m(в-ва)=200г-20г=180 (г) - m(спирта)

Ответ: m(йода)=20г ; m(спирта)=180г.

Answer 2

Preparation of 200g of Iodine Tincture

To prepare 200g of iodine tincture, which is a 10% solution of iodine in alcohol, we need to determine the amount of crystalline iodine and alcohol required.

Let's assume that the percentage refers to the weight/volume percentage, meaning that the solution contains 10g of iodine in 100mL of alcohol.

To calculate the amount of iodine and alcohol needed, we can use the following formula:

Amount of substance (g) = Percentage / 100 * Total volume (mL)

1. Calculating the amount of iodine: - Percentage of iodine in the solution: 10% - Total volume of the solution: 200g

Using the formula, we can calculate the amount of iodine needed:

Amount of iodine (g) = 10 / 100 * 200 = 20g

Therefore, 20 grams of crystalline iodine should be taken to prepare 200g of iodine tincture.

2. Calculating the amount of alcohol: - Percentage of alcohol in the solution: 90% (since the solution is 10% iodine, the remaining 90% is alcohol) - Total volume of the solution: 200g

Using the formula, we can calculate the amount of alcohol needed:

Amount of alcohol (mL) = 90 / 100 * 200 = 180mL

Therefore, 180 milliliters of alcohol should be taken to prepare 200g of iodine tincture.

Please note that these calculations assume that the density of alcohol is approximately equal to 1g/mL.