Answer:
Volume of water
Initial temperature of the solution
Final temperature of the solution
Mass of NH₄Cl
Explanation:
There are two heat transfers involved in this experiment.
Heat of solution of NH₄Cl + heat lost by water = 0
q₁ + q₂ = 0
nΔH + mCΔT = 0
nΔH = -mCΔT
ΔH = -mCΔT/n
So, you must measure
- the volume of water (you will probably use its density to calculate its mass)
- the initial and final temperatures of the solution (to calculate ΔT)
- the mass of NH₄Cl (to calculate the number of moles)
You will probably assume that the specific heat capacity of the solution is the same as that of water, so you won't be measuring it.
The maximum concentration (in m) of calcium ions[] in the given solution is 6.2×
The balanced equillibrium equation is ,
(s) ↔ (aq) + (aq)
From the reaction equation above, the formula for Ksp:
Ksp = [][ ] = 3.4×
We know the value for [ ] , so we can solve for []as:
( 3.4×) = [] (0.055)
[] = 61.8×
[] = 6.2×
Therefore, the maximum concentration (in m) of calcium ions[] in the given solution is 6.2×
Learn more about calcium ions[] here:
brainly.com/question/19865131
#SPJ4
Answer:
A compound
Explanation:
Sugar is a compound because it contains the atoms of three different elements in a fixed ratio (C:H:O = 12:22:11).
An <em>element</em> contains only one type of atom.
<em>Mixtures</em> and <em>solutions</em> can have variable compositions.
Answer:
The Heisenberg uncertainty principle states that the exact position and momentum of an electron cannot be simultaneously determined.