contestada

a cleaning crew always uses a 10% disinfectant solution on very delicate surfaces. but today the crew only has a 50% disinfectant solution. if the crew needs 25 liters of 10% solution how many liters of water and how many liters of the 50% disinfectant should they mix

Respuesta :

kyominchloe

Answer:

Step-by-step explanation:

50/10=5 times stronger

25/5=5 liters of disinfectant

25-5=20 liters of water

Crew should mix 50% disinfectant & water in 20 & 5 litres combo respectively, to get 25L of 10% solution.

Calculation of disinfectant & water concentration

Required : 10% disinfectant solution

Given : 50% disinfectant solution

Quantity needed = 25L

Let the proportion of disinfectant diluted with water to form the desired solution be = x

So, remaining water proportion = (25 - x)

Equation for needed average solution level :

x (50%) + (25 - x) (0%) = 10%

0.5x + 0 = 0.10

x = 0.10 / 0.5

x = 0.2 ie 20% of total solution

x {Disinfectant needed} = 20% of 25 = 5L

So, remaining water needed = 25 - 5 = 20 L

To learn more Average Concentrations, refer https://brainly.com/question/17421929

Otras preguntas