Questions tagged [mixtures]

Questions related to the physical combination of two or more substances on which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.

Filter by
Sorted by
Tagged with
-3
votes
0answers
28 views

How to prepare 96% ethanol from 100% ethanol (200 proof)?

can someone please help me calculate how to make 96% alcohol using 100% ethanol (or 200 proof)? According to European Pharmacopoeia (EP), ethanol content is calculated from the relative density using ...
1
vote
1answer
49 views

Find gas pressures of injection knowing mixture pressure without knowing volume

Let's say we have a gas 1 moving inside a pipe (we don't know the geometry) at mass flow rate $Q_1$ and temperature $T_1.$ We inject a gas 2 at some point inside the pipe with gas 1 at mass flow rate $...
-1
votes
0answers
27 views

Are there any “tricks” to mixing two liquids with a magnetic stirrer?

I have two liquids - one that's mostly nonpolar, the other that's mostly polar. I'm trying to get a good mix between the two using a magnetic stirrer. One of the liquids is practically clear, so it's ...
1
vote
1answer
55 views

Find the molality

Find the molality of a mixture formed by mixing $200cm^3$ of $HNO_3$ that has a $69\%$ of richness and density $1.41g/mL$, with $1L$ of the same acid with $1.2M$ and density $1.06g/mL$. Attempt. The ...
1
vote
1answer
59 views

Find the molarity and molality

We take 10mL of $H_2SO_4$ with a $96\%$ of mass and density $1.84g/cm^3$, and we add it into a flask that has $0.5L$ of capacity, filled up to half of the flask with distilled water. We shake the ...
0
votes
0answers
42 views

Dynamic viscosity of gas mixture (appropriate estimation)

What estimation of the dynamic viscosity $\eta = f(T)$ $([\eta] = \pu{Pa·s})$ of the gas mixture components would you recommend during adsorption at a low temperature, approx. $\pu{293 K}$ to $\pu{333 ...
1
vote
1answer
110 views

Calculating the percentage of (+)-2- butanol in the sample

Specific rotation of (+)-2-butanol is 12.5$^{\circ}$ . A sample of 2-butanol containing both the enantiomers was found to have specific rotation value of –2.8$^{\circ}$ . What is the percentage of (+)-...
-3
votes
1answer
88 views

Green stuff from natural crystal [closed]

I continuously soak this natural quartz (it is originally white) in basin of water and salt, it has a metal on it too. What caused the green stuff? How to remove it?
1
vote
0answers
35 views

Is it easier to mix a solution that is in the liquid or in the vapor phase?

In the article on dilution, Wikipedia has the following statement: The same direct relationship applies to gases and vapors diluted in air for example. Although, thorough mixing of gases and vapors ...
0
votes
2answers
57 views

Are all mixtures linear?

I'm writing a computer program to help a factory produce bottles of mixtures. A mixture is usually alcohol, water and some other stuff, like menthol. But could also be water and NaOH and some oils (...
-1
votes
1answer
229 views

Would Oxygen Gas and Ozone be a pure substance together? [closed]

If I have oxygen gas and ozone ($\ce{O2 + O3}$) together would it be considered a pure substance or a mixture? And would pure substances always have the same molecular structure?
0
votes
0answers
31 views

What would happen if equal parts of hydrochloric acid, mercury and methylene chloride were mixed?

I was going through the archive of Real Life Comics (first time reader, enjoying it so far), and in one of the comics, the main character of the comic reveals he has ordered hydrochloric acid, ...
0
votes
0answers
29 views

Why does a dilution refrigerator work?

I read the wiki https://en.wikipedia.org/wiki/Dilution_refrigerator And my interpretation is that you get one cold liquid(helium 3) and add it to another (helium 4). The molecules of the liquids ...
-2
votes
2answers
77 views

Finding the pH of the resultant solution when a pH1 solution mixed with a pH2 solution [closed]

I want to know that is it possible that a $\mathrm{pH_1}$ solution mixed with a $\mathrm{pH_2}$ solution and the mixture would be less than $\mathrm{pH_1}$? Is it possible that the result has a lower $...
7
votes
1answer
516 views

Is the density of a two-component mixture always between the densities of its individual components?

There exist eutectic mixtures, in which the freezing point of the mixture is below those of either component of the mixture, i.e., the freezing point of the mixture is not intermediate between that of ...
0
votes
1answer
80 views

How do I calculate the humidity inside sealed containers containing mixing salts?

At $\pu{25 ^\circ C}$: saturated Magnesium chloride $\ce{MgCl2}$ keeps humidity 33% inside sealed containers. saturated Sodium chloride $\ce{NaCl}$ keeps humidity 75% inside sealed containers. I ...
1
vote
1answer
108 views

Mass percent and mole percent of a composition

The Problem A gas mixture contains hydrogen, carbon monoxide, and carbon dioxide. Calculate: a) The mass% hydrogen if the mixture contains 15 mol% $\ce{CO}$ and no $\ce{CO2}$; b) The molar composition ...
0
votes
1answer
25 views

Hydrogen peroxide and ThickenUp (potassium chroride) [closed]

Retr0bright is used to whiten yellow plastic. The original recipe contains xantham rubber that is a bit hard to find. I'm thinking about using Nestlé ThickenUp that contains xantham rubber, but it ...
0
votes
0answers
17 views

Energy and impurities balance for adsorption with a fixed bed (with description)?

Do you have any suggestion where to look for a source of information about energy and impurities (component) balance for adsorption of mixture CO2/H2O in fixed bed? I have looked into many articles /...
-1
votes
1answer
56 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 ...
0
votes
0answers
62 views

Gas / Gas mixture dynamic viscosity temperature and pressure dependance

I’m trying to get an accurate interpretation of certain gases ($CO_2$, $N_2$, $NO$, etc.) dynamic viscosity [Pa.s] as a function of temperature and pressure (afterwards determine the dynamic viscosity ...
-1
votes
1answer
37 views

Reason for nomenclature of azeotropic mixtures [closed]

The book states the solution which shows large positive deviation from Raoult's Law form minimum boiling azeotrope What is meant by " minimum boiling azeotrope" or I should say what does ...
1
vote
1answer
133 views

Did I accidentally create phosgene gas [closed]

I accidentally mixed bleach and acetone trying to remove hair dye stains from my shower wall. The mixture turned orange when the bleach and acetone touched. Could I have created phosgene gas ...
4
votes
1answer
33 views

Combination of polydisperse polymer mixtures

Say I'm given a mixture of batches of polydisperse polymers. I know the weight $w$, the number average $ \bar M_n$, and the weight average $ \bar M_w$ of each batch that was added to the final mixture....
4
votes
2answers
438 views

What is the entropy of mixing a gas into the whole atmosphere?

Suppose I release 1 mole of pure argon into the atmosphere. What is the entropy of mixing? The equations I have found seem to only apply to the case of a fixed volume. Should I use an estimate of the ...
5
votes
1answer
1k views

Strong exothermic mixing of two 'safe' liquids

I have read (thanks to Stack Exchange) that mixing water and sulfuric acid is exothermic, as is NaOH and HCl. Are there two 'safe' liquids that can be mixed and produce anywhere near the same amount ...
0
votes
0answers
37 views

What is the result of the combustion of the mixture?

I prepared a little experiment about solid rocket propulsion. I have used water ($H_{2}O$), potassium nitrate ($KNO_{3}$) and saccharose ($C_{12}H_{22}O_{11}$). I made the mixture in a pan by cooking ...
1
vote
0answers
159 views

Calculating concentration of a powder in a liquid

I'm trying to determine how to calculate proper measurements for a 5% concentration of a vitamin C ester powder (ascorbyl palmitate) mixed in a 50/50 carrier oil mixture (jojoba oil/squalane oil) with ...
0
votes
1answer
43 views

How to find the volume of the products in methane combustion?

The combustion of methane gas, $\ce{CH4}$, gives as products $\ce{CO2}$ and $\ce{H2O}$, both in the gas phase. If $1$ liter of methane is burned in the presence of $10$ liters of $\ce{O2}$. Suppose ...
0
votes
0answers
55 views

Why Does Adding Catalyst Slow Down My Reaction?

I currently did a lab where I was meant to identify factors that increase the rate of the reaction. I reacted Glucose with Potassium Permanganate and used Sulfuric Acid as a catalyst. But in my ...
0
votes
1answer
557 views

dissolving powder [closed]

I have small amount of rosemary herb powder mixed in a cup of water and it's only party dissolving. I was wondering if there is another powder that can be added to this water solution and dissolve the ...
0
votes
0answers
28 views

Combining two high-VP chemicals to get a low-VP mixture

I'd like to do a class experiment as a metaphor for human relationships. Two people each have a different chemical which evaporates quickly (at STP). There is one glass between them. If only one ...
0
votes
1answer
93 views

Why does adding salt to water help distillation?

I've been looking at instructions on how to get lanolin from fleece and a lot of the instructions mention that adding salt to the water before distillation will increase the lanolin yield. Why is this?...
-2
votes
2answers
203 views

Ratio of Water to Isopropyl Alcohol? [closed]

I am looking for a very simple formula to calculate the ratio of water to 99% isopropyl alcohol that I need to prepare a solution with a density of 0.925 g/cm3. I am assuming there is one.
1
vote
0answers
34 views

Carbon Capture Absorption with Henry's Law

Assume the Henry’s coefficient for water at $\pu{20 °C}$ is $\pu{1.6E8 Pa}.$ What is the mole fraction of $\ce{CO2}$ that will be dissolved in water assuming that it is at equilibrium with a flue gas ...
1
vote
0answers
33 views

Gelifying hydrogen peroxide

What substances could be used to gelify 60% hydrogen peroxide? I imagine anything organic like agar would be broken down by the radicals. I tried looking up what dentists use and the only thing that ...
1
vote
0answers
49 views

Mixing ink with alcohol, MEG and water

First of all, I'm not a chemist and my knowledge in chemistry is not that extensive. However, I would like ask the following question: are there any chemical reasons that would explain that mixing a ...
6
votes
1answer
144 views

How Would A Vast Mixture (Like an Ocean) of Ammonia-Water Behave in Terms of Evaporation and Freezing?

First, I'll go ahead and say I'm not very versed in chemistry. My question comes from my interest in planetary-sciences, specifically the speculation that there are likely exoplanets and moons with ...
-2
votes
1answer
70 views

Club soda manufacturing process and problem in quality

How to increase $\ce{CO2}$ gas in club soda? I am planning to start a PET bottled club soda industry. My process involves chilling the water up to about $\pu{4 °C}$ and filling under pressure up to $\...
1
vote
0answers
41 views

How do blue shifts in Raman spectra indicate a co-crystalline compound?

The short conference paper The Acetylene-Butane Co-Crystal: A Potentially Abundant Molecular Mineral on Titan (mentioned in EurekaAlert's 'Bathtub rings' around Titan's lakes might be made of alien ...
1
vote
0answers
159 views

Over time what happens to soluble liquids with different densities

I have a case with two liquids: Water and another chemical which is miscible in water. The chemical has a density of 800 g/l so it's 20% less dense than water. Initially the chemical was mixed with ...
2
votes
0answers
64 views

What kind of chemical reaction happens when combining Tahini and Date syrup?

While both Tahini and Date syrup are quite thin, when mixed together they form a paste-like substance that is very delicious, and quite thick. But what kind of chemical reaction leads to such sudden ...
0
votes
2answers
121 views

How do I calculate the total volume when i mix 1000 kg of glucose with 5000 L of water

I want to know how to calculate the resulting volume when I mix 1000 kg of glucose into 5000 L of water. How does the calculation change if I'm mixing NaCl into the water, instead of glucose? Or ...
0
votes
0answers
93 views

Will evaporation from two immiscible liquids blow up a balloon?

Consider the following setup: Two immiscible liquids A and B are placed inside a balloon at a temperature where neither one of them boils. The inside of the balloon contains some argon, and the ...
14
votes
3answers
3k views

Is it possible to boil a liquid by just mixing many immiscible liquids together?

In open air, when vapour pressure reaches 1 atm, boiling takes place. I read that if we add two immiscible liquids together, the total vapour pressure of the 'mixture' is close to $p = p^*_A + p^*_b$,...
4
votes
1answer
1k views

Miscibility of Hexane and Ethanol (Anhydrous vs 96%)

In my lab, I mixed 8:2 (mass:mass) of Hexane:Ethanol (Hexane: 0 ppm of water content, ...
-1
votes
2answers
117 views

Average Molar Weight

We have a mixture of two gases, say nitrogen and hydrogen. To calculate the average molar weight M , the formula says: M (average) = (hydrogen pressure/100).M(H2) + ( 1 - nitrogen pressure/100).M(N2)...
20
votes
2answers
1k views

Can a stoichiometric mixture of oxygen and methane exist as a liquid at standard pressure and some (low) temperature?

This answer to the question Pre-mixing cryogenic fuels and using only one fuel tank written by a non-chemist (me) begins with: At STP: LOX's boiling point is 90.19 K Methane's freezing point is 90....
1
vote
1answer
85 views

Why do properties of colloidal solution depend only on dispersion medium's physical state? [closed]

According to a past year JEE question, properties of colloidal solution depends only on dispersion medium's physical state and not on nature of dispersed phase or dispersion medium, or temperature of ...
1
vote
1answer
102 views

Mass fraction in a mixture of metal salts given the total mass of the metal

I am trying to solve a question in my study and I don't get the answer required. A mixture of $\ce{NaNO3}$ and $\ce{Na2SO4}$ weight $5.37$ grams, the $\ce{Na}$ = $1.61$ grams. What is the ...