Fe3+(aq) (yellow) + scn-(aq) (colorless) fescn2+(aq) (blood-red) chloride ions are colorless. potassium ions are also colorless. the above equilibrium can be created by mixing an iron (iii) chloride solution with a potassium thiocyanate solution. based on this information and the colors in the equilibrium above answer the first two questions. 1. what color would an fecl3 solution be? 2. what color would a kscn solution be? 3. what color do you get when you mix fecl3 and kscn as shown in the video for the control test tube?

Explanation:

The above two reactions xcan also be written in form of single chemcial equation:

1. Color of ferric chloride solution is yellow. This is due to presence of ferric ions which have yellow color in their aqueous solutions.

2. KSCN has the colorless solution. This due to potassium ion forms colorless aqueous solution.

3. On mixing, KSCN with we will get blood red color solution of .

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

the correct answer would be d. hope this !