Crystal water

The chemist wanted to check the content of water of crystallization of chromic potassium alum K2SO4 * Cr2 (SO4) 3 * 24 H2O, which was a long time in the laboratory. From 96.8 g of K2SO4 * Cr2 (SO4) 3 * 24 H2O prepared 979 cm3 solution of base. Subsequently, the 293 cm3 of the stock solution, a solution of barium nitrate, and a precipitate precipitated weighing 19.6 g.

How many crystal water instead of 24 molecules contain salt?

M (K2SO4 * Cr2 (SO4) 3 * 24 H2O) = 998.2 g / mol, M(BaSO4) = 233.4 g / mol
M(K2SO4 * Cr2 (SO4) 3) = 566.2 g / mol, M (H2O) = 18 g / mol

Result

x =  546.2 g

Solution:

$x=546.2 = \dfrac{ 2731 }{ 5 } = 546.2 \ \text{ g }$

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!

Tips to related online calculators
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. Theorem prove
We want to prove the sentence: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
2. Evaluation of expressions
If a2-3a+1=0, find (i)a2+1/a2 (ii) a3+1/a3
3. Square root 2
If the square root of 3m2 +22 and -x = 0, and x=7, what is m?
4. Equation 23
Find value of unknown x in equation: x+3/x+1=5 (problem finding x)
5. Difference AP 4
Calculate the difference of the AP if a1 = 0.5, a2 + a3 = -1.1
6. Warehouses
In the three warehouses, a total of 70 tons of grain was stored. In the second warehouse was stored 8.5t less and in the third 3.5t more than in the first. How many tons of grain was stored in each warehouse?
7. Solve 3
Solve quadratic equation: (6n+1) (4n-1) = 3n2
8. Parametric equation
Find the parametric equation of a line with y-intercept (0,-4) and a slope of -2.
9. Given
Given 2x =0.125 find the value of x
10. Intercept with axis
F(x)=log(x+4)-2, what is the x intercept
11. Third member
Determine the third member of the AP if a4=93, d=7.5.
12. GP members
The geometric sequence has 10 members. The last two members are 2 and -1. Which member is -1/16?
13. Asymptote
What is the vertical asymptote of ?
14. Linear imaginary equation
Given that ? "this is z star" Find the value of the complex number z.
15. Ball game
Richard, Denis and Denise together scored 932 goals. Denis scored 4 goals over Denise but Denis scored 24 goals less than Richard. Determine the number of goals for each player.
16. Solve equation
solve equation: ?
17. The sum 2
The sum of five consecutive even integers is 150. Find the largest of the five integers. A.28 B.30 C.34 D.54 Show your solution and explain your answer.