All Questions
Tagged with solutions aqueous-solution
202
questions
1
vote
1
answer
2k
views
Using solubility product to determine the mass of the precipitate of a reaction
I mix together $\pu{100 mL}$ of an aqueous $\ce{NaCl}$ solution at $\pu{0.5 M}$ and $\pu{100 mL}$ of an aqueous $\ce{AgNO3}$ solution at $\pu{0.3 M}$. Assuming that the solubility of $\ce{NaCl}$ in ...
2
votes
1
answer
972
views
Creating a 10 ppb Lead Nitrate Solution
I’m trying to make a 10 ppb Lead Nitrate solution as part of a concentration calibration step for a Beer Lambert’s Law experiment. I plan on performing a dilution in three steps. The calculations have ...
-1
votes
1
answer
910
views
Why do azeotropes boil at constant temperature? [closed]
As given in the Wikipedia page,
An azeotrope (/əˈziːəˌtroʊp/) or a constant boiling point mixture is a mixture of two or more liquids whose proportions cannot be altered or changed by simple ...
-1
votes
2
answers
1k
views
In a double displacement reaction, why don’t the two products reform after being dissolved in water? [duplicate]
Let’s say I have $\ce{AB (aq) + CD (aq) —> AD + CB}$. When AB and CD are dissolved in water, they get dissociated into their component ions. But why don’t they reform as AB and CD, if it is already ...
-1
votes
1
answer
119
views
Difference between homogeneous and heterogeneous mixture [closed]
When i mix two equal but large number of stones it is possible (though extremely unlikely) that stone a and stone b perfectly segregate themselves into two halves or that they are uniformly ...
-1
votes
1
answer
98
views
Microscopic View of Adding Water to A Basic Solution
I confronted a problem, stating that we have a solution of potassium hydroxide. By adding extra water, when the volume of solution reaches 630 mL, the pH decreases by 0.5 units. How much extra water ...
1
vote
0
answers
41
views
Science of soap bubbles
On the web there are tons of different recipes for a solution to make soap bubbles.
Most of them use only three ingredients:
water
dish soap
glycerin
But their ratios widely change among the sources....
1
vote
0
answers
78
views
What is the precipitate of aqueous copper (II) and polysulfides?
So if you heat up a piece of sodium engulfed in a large excess of sulfur, what you would get (from what I've read) is sodium polysulfide $\ce{NaS_n}$. But how large can $n$ get? If you left sodium ...
-3
votes
2
answers
306
views
How does one dilute sulphuric acid (1.28sg@25ºc 460g/L) to 3 M Sulphuric Acid?
Thanks for looking.
The extent of my research around the issue so far.
SA sg table but wrong temp 60f not 77f/25c
http://www.sschemical.com/wp-content/uploads/2013/05/Conversion_Table.pdf
From
...
0
votes
1
answer
115
views
Solution for Electroplating Selenium?
I need to electroplate selenium onto a conductive metal (for an experiment). The end goal is a thin film of pure, elemental selenium. Unfortunately I can't find anything on the internet: Ideally, I'd ...
3
votes
1
answer
183
views
Hydrochloric acid substitute in an Iron-gall ink solution
Recently I started experimenting with making my own ink to be used in fountain pens.
I was wondering if hydrochloric acid in an iron-gall ink is used to prevent sediment ONLY by lowering the pH of ...
0
votes
2
answers
2k
views
How much of Sodium dichloro-s-triazinetrione dihydrate should I use to replace bleach? [closed]
I am trying to determine how much sodium dichloro-s-triazinetrione dihydrate powder I should add to water to create a dilution that can be injected into my water supply to react with the Hydrogen ...
1
vote
0
answers
55
views
Can Methylene Blue Detect Spoilage in Food?
Initially, there is already a product which is a sensor based on Methylene Blue, which can detect changes in oxygen levels in a packaging. However, as our thesis project, we decided to take on this ...
0
votes
1
answer
2k
views
Is the solution isotonic, hypertonic, or hypotonic?
The problem is shown below. I don't understand how can the tonicity of a solution be determined if the solution has multiple solutes dissolved in it.
Do I take the total sum of the mass of solutes ...
-3
votes
2
answers
451
views
How would I separate a solution of sodium iodide and water in order to obtain the sodium [closed]
I am an amateur in this field of science and I am trying to separate a solution of Sodium Iodide and water. How would I separate the solution so I can obtain sodium?