All Questions
9
questions
2
votes
2
answers
316
views
My textbook writes hydronium ion as [H(H2O)]+, is this correct? [closed]
[...] Thus, it bonds to the oxygen atom of a solvent water
molecule to give trigonal pyramidal hydronium ion, $\ce{H3O^+}$ $\ce{\{[H (H2O)]^+\}}$ (see box).
In this chapter we shall use $\ce{H^+(aq)}$ ...
- 127
-7
votes
1
answer
4k
views
Is Phosphate (PO4 3-) solube in water? [closed]
Josh~
Superphosphate is used instead of just phosphate because superphosphate is a compound whereas phosphate is an ion. This means that phosphate must attach itself with a cation in order to give a ...
-1
votes
1
answer
97
views
How does the water pollutant sodium nitrate affect the concentrations of other ions in tap (dam) water? [closed]
Context
In my assignment I've been given two water samples from the hinze dam. The first sample has been untouched, however the second has been contaminated with an unknown ionic compound. To ...
- 1
1
vote
1
answer
2k
views
Do we consider the dissociation of water when dealing with ion concentrations of a solution?
One mole of hydrated copper(II) sulfate, $\ce{CuSO4 . 5 H2O},$ is dissolved in water. How many moles of ions does the solution contain?
1) 1
2) 2
3) 6
4) 7
The correct answer is 2. Specifically, I'm ...
- 39
4
votes
1
answer
789
views
Relationship between the water ionization constant and ionic strength
I read in a textbook that
the water ionization constant ($K_\mathrm{w}$) increases as the ionic strength of the solution increases
and it confused me. If the ionic strength increased, then the ...
- 137
3
votes
1
answer
4k
views
Reversibility of an acid's reaction with water depending on its strength
This is how my chemistry professor compared reaction of a weak and a strong acid with water:
$$\ce{HCl + H2O -> H3O+ + Cl- + Heat}$$
In this case $\ce{H2O}$ breaks the bond between $\ce{H}$ ...
- 183
1
vote
1
answer
259
views
Do ion-exchange resins soften water through a kinetic equilibrium process?
I searched a lot for this and couldn't find any answers. Is water softening a purely ratio-based equilibrium process, ie, more $\ce{Na+}$ cations on resin than there are $\ce{Ca^2+}$ cations in the ...
- 11
6
votes
1
answer
5k
views
Hybridization of Na in [Na(H2O)6]+
In the complex ion $\ce{[Na(H2O)6]+}$, the sodium cation forms 6 coordinate bonds with water ligands. Typically this octahedral form is associated with $\mathrm{sp^3d^2}$ hybridization as far as I ...
- 723
3
votes
2
answers
11k
views
Are Na and Cl ions from NaCl in water separate charged particles?
Suppose I pour some sodium chlorine into water. So, what happens is that
$$
\ce{NaCl (s) -> Na+ (aq) + Cl- (aq)}
$$
meaning that the ionic bond between Na and Cl breaks up (correct this far?)
...
- 55