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4 years ago

Why does the colour of copper sulphate solution change when an iron nail is dipped in it?

Chemistry

1 answer:

sineoko [7]4 years ago

4 0

Answer:

bcoz iron displaces copper and form the solution iron sulfide

Explanation:

when we dip iron nail in copper sulfate solution,then iron starts reacting with the solution and due to displacement reaction between them iron is stronger metal than copper so it displaces copper and form iron sulfide:

CuSO4+3Fe---->Fe3SO4+Cu

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According to the Brensted-Lowry model write the equation for provided acid showing

Taya2010 [7]

Answer:

i dont know sorry

Explanation:

3 0

3 years ago

What volume (mL) of a concentrated solution of sodium hydroxide (6.00 M) must be diluted to 187 mL to make a 1.53 M solution of

Len [333]

Answer:

47.68 mL

Explanation:

In this case, we have a dilution problem. So, we have to start with the dilution equation:

$C_1*V_1=C_2*V_2$

We have to remember that in a dilution procedure we go from a higher concentration to a lower one. With this in mind, We have to identify the concentration values:

$C_1~=~6.00~M$

$C_2~=~1.53~M$

The higher concentration is C1 and the lower concentration is C2. Now, we can identify the volume values:

$V_1~=~X$

$V_2~=~187~mL$

The V2 value has "mL" units, so V1 would have "mL" units also. Now, we can include all the values into the equation and solve for "V1", so:

$6.00~M*V_1=1.53~M*187~mL$

$V_1=\frac{1.53~M*187~mL}{6.00~M}=47.68~mL$

So, we have to take 47.68 mL of the 6 M and add 139.31 mL of water (187-47.68) to obtain a solution with a final concentration of 1.53 M.

I hope it helps!

6 0

3 years ago

Which of the following statements about atoms is NOT true?

Alika [10]

Answer:

atoms are too small to be seen under a microscope

Explanation:

scientists have been always making research on atomic structure which cannot be directly looked through a microscope

6 0

3 years ago

The needles of an evergreen tree are most similar to what part of other trees?

tatuchka [14]

Answer:

the leaves i think

Explanation:

i had this on a test once.

8 0

3 years ago

Which of the following is an acid-base neutralization reaction? (1 point) Sn + 2HBr yields SnBr2 + H2 HCl + KOH yields KCl + H2O

borishaifa [10]

Answer:

Explanation:

Sn + 2HBr = SnBr₂ + H₂

Here HBr is an acid but Sn is not a base . It is a metal . So it is not an acid - base reaction .

HCl + KOH = KCl + H₂O

HCl is an acid and KOH is a base so it is an acid base reaction.

2AlCl₃ + 3Ca(OH)₂ = 2Al(OH)₃ + 3CaCl₂

It is an acid base reaction . It is so because aluminium hydroxide is a lewis acid and calcium hydroxide is a base . So it is an acid base reaction .

2C₂H₆ +7O₂ = 4CO₂ + 6H₂O

It is not an acid base reaction . It is actually an example of oxidation reaction in which ethane burns in oxygen to give carbon dioxide and water.

5 0

3 years ago