Q3. A student plans a method to prepare pure crystals of copper sulfate.

Mathematics

1 answer:

andreev551 [17]3 years ago

3 0

Answer:

1) The student didn't add copper sulfate but instead he added calcium carbonate.

2) The heated solution should be left to get bigger crystals and should not be instantly allowed to evaporate.

3) He should use copper carbonate not calcium carbonate.

4) Sulfuric acid was added instead of hydrochloric acid.

5) Add solid excessively so that all of the acid is retained.

6) Filter the solution to remove unreacted solid.

7) Heat gently, so the crystals will start to appear.

You might be interested in

Answer questions below<br> ASAP<br> 5-1/2x=5/8x+2

jeka57 [31]

Answer: x = 8/3 ; or, write as: 2 2/3; or, write as, 2.66666667 .
_________________________________________________________
Explanation:
_________________________________________________________

Given: 5 − 1/2 x = 5/8 x + 2 ;
______________________________________________________
Change the 1/2 x to "4/8 x" ;
_________________________________________________
Since "1/2" = "(1*4)/(2*4)" = "(4/8)"; and rewrite:
_________________________________________________
→ 5 − (4/8)x = (5/8)x + 2 ;
_________________________________________________
Subtract "5"; and add "(5/8)x" to EACH side of the equation:
________________________________________________
5 − (4/8)x − 5 + (5/8)x = (5/8)x + 2 − 5 + (5/8)x ;
_________________________________________________
to get:
_______________________________________
(1/8) x = (10/8)x − 3
___________________________________________________________
Multiply the entire equation (BOTH SIDES) by "8"; to get rid of the fraction:
_________________________________________________________

8 * { (1/8) x = (10/8)x − 3 };
______________________________
to get:
______________________________
x = 10x − 24 ;
___________________________________
Subtract "x" ; and add "24" ; to EACH side of the equation:
____________________________________________________
→ x − x + 24 = 10x − 24  − x + 24 ;
____________________________________________________
to get:
_____________________________________________________
→ 24 = 9x ; ↔ 9x = 24 ;
______________________________________
  → Divide EACH side of the equation by "9" ; to isolate "x" on one side of the equation; and to solve for "x" ;
_______________________________________
  → 9x / 9 = 24 / 9 ;
_______________________________________
  → x = 24/9 = (24÷3)/ (9÷3) = 8/3
_______________________________________________
→ x = 8/3 ; or, write as: 2 2/3; or, write as, 2.66666667.
_______________________________________________________

5 0

4 years ago

Anyone can help me please?

mrs_skeptik [129]

Answer:

40% is what i think it is

6 0

3 years ago

Item

goblinko [34]

C is the answer 12 marbles and 20 marbles

8 0