# Copper sulphate

How much g of water do we have to add to 240 g of an 84% CuSO4 solution to produce a 60% solution? (Express the mass of crystalline CuSO4 in the original solution and in the resulting solution and compare them. )

Result

w =  96 g
m1 =  201.6 g
m2 =  201.6 g

#### Solution:

0.84*240 = 0.60 *(240+w)

0.6w = 57.6

w = 96

Calculated by our simple equation calculator.
$m_{ 1 } = 0.84 \cdot \ 240 = 201.6 = \dfrac{ 1008 }{ 5 } = 201.6 \ \text { g }$
$m_{ 2 } = 0.60 \cdot \ (240+w) = 0.60 \cdot \ (240+96) = \dfrac{ 1008 }{ 5 } = 201.6= \dfrac{ 1008 }{ 5 } = 201.6 \ \text { g } \ \\ \ \\ m_{ 1 } = m_{ 2 }$

Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

#### Following knowledge from mathematics are needed to solve this word math problem:

Our percentage calculator will help you quickly calculate various typical tasks with percentages. Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

## Next similar math problems:

1. Gutter
How much metal is needed for production 60 pieces of gutter pipes with the diameter 17 cm and length of 6 m? The plate bends add 6% of the material.
2. River
Calculate how many promiles river Dunaj average falls, if on section long 957 km flowing water from 1454 m AMSL to 101 m AMSL.
3. Tanks
Fire tank has cuboid shape with a rectangular floor measuring 13.7 m × 9.8 m. Water depth is 2.4 m. Water was pumped from the tank into barrels with a capacity of 2.7 hl. How many barrels were used, if the water level in the tank fallen 5 cm? Wr
4. Sea water
Seawater contains about 4.3% salt. How many dm3 of distilled water we must pour into 5 dm3 of sea water to get water with 1.8% salt?
5. Vinegar 2
How many percentage of getvinegar solution, if we mix to 3.5 liters of 5.8% and 5 liters of 7.6% vinegar?
6. Bonus
Gross wage was 527 EUR including 16% bonus. How many EUR were bonuses?
7. Server
Calculate how many average minutes a year is a webserver is unavailable, the availability is 99.99%.
8. Blood
In human body the blood is about 7.3% body weight. How many kilograms of blood is in the human body with weight 109 kg?
9. Discount
Ladies sweater was twice discounted. First by 11%, then by 11% of the new price. Its final price was 100 €. Determine the original price of sweater.
10. Rectangle
In rectangle with sides, 6 and 3 mark the diagonal. What is the probability that a randomly selected point within the rectangle is closer to the diagonal than to any side of the rectangle?
11. Inflation
What is better for people (employees)? ?
12. Ace
From complete sets of playing cards (32 cards), we pulled out one card. What is the probability of pulling the ace?
13. Crystal
Crystal grows every month 1.2 promile of its mass. For how many months to grow a crystal from weight 177 g to 384 g?
14. Alcohol
How many 55% alcohol we need to pour into 14 liters 75% alcohol to get p3% of the alcohol? How many 65% alcohol we get?
15. Climb in percentage
The height difference between points A and B is 475 m. Calculate the percentage of route climbing if the horizontal distance places A, B is 7.4 km.
16. Percentages above 100%
What is 122% of 185? What is the meaning of percentages above 100%?
17. Barrel of oil
Barrel of oil weighs 283 kg. When it mold 26% oil, weighed 216 kg. What is the mass of the empty barrel?