# All Questions

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### Why is methoxide a strong base?

Why is methoxide strong base? In case of halogens, I get why one is weak base, and one is strong base, but in the case of ones with oxygen, this seems to be hard to figure out.
5k views

### Can natural gas appliances run on Hydrogen?

Can natural gas appliances run on Hydrogen? If so, does the appliance have to be modified and how significant of a modification would it need? Thanks
1k views

### How many elements in food?

A slightly deranged curiosity: if we had a 3D printer able to “print” anything starting from “cartridges” of pure chemical elements, how many of the 118+ possible cartridges (or of the 98ish for non-...
430 views

### Analysis of a mixture of carbonate salts

We've got a mixture of carbonate salts. It's a buffer, used in fish tanks. How might we go about identifying the components and their concentrations? I suspect it'd be hard to separate some of this. ...
113k views

### Is melting/boiling point of ionically bonded substance higher than of covalently bound?

Is the melting and boiling point of ionic bond usually higher than covalent bond? I know that compounds with ionic bonds are usually solid at room temperature, so I want other answers than this. (...
11k views

### Energy required to break single bond vs double bond vs triple bond of a carbon atom in an organic molecule

Assuming every other conditions are the same, what would be the comparison of energy required to break single bond, double bond and triple bond of a carbon atom in an organic molecule?
10k views

### How do indicators work when they mixed with each other?

Methyl orange, bromothymol blue and phenolphthalein indicators were mixed together to form a solution. Over what pH range would the solution be yellow? I cannot understand the question. If two or ...
25k views

### Why is ethanol written as C2H5OH not C2H6O?

This is balanced equation of fermentation of glucose: $$\ce{C6H12O6(aq) -> 2C2H5OH(aq) + 2CO2(g)}$$ I know that the result of glucose fermentation is ethanol ($\ce{C2H6O}$). What represented in ...
3k views

### Why does a silane group react with hydroxyl groups?

I read somewhere that a silane group will react with hydroxyl groups. Does anyone know why this would happen?
8k views

### What impact does heating or cooling have on the oxidation reduction potential of water?

There are alkalinizing water ionizers on the market that lower the ORP of water. Does heating or cooling that water have an impact on its ORP?
3k views

### How do you explain the thread sticking to an ice-cube when salt is sprinkled over it?

So this experiment goes like this : You take an ice-cube You put a thread on top face of it You sprinkle some common salt on the ice-cube wherever its touching the thread You wait for sometime (...
190k views

### How can melting point equal freezing point?

I don't understand how the freezing point of a substance is the same temperature as the melting point of the same substance. For example, if liquid water freezes at 0 °C how can ice also melts at 0 °...
13k views

### What is the effect of adding salt to ice?

What will happen to the melting point temperature of ice if some common salt is added to it? How to justfy the answer?
732 views

### Having problems running DFTB using dftb.org parameter files on Gauss 09 (G09)?

I ran into an issue trying to run dftb.org parameter files on G09 and found questions asked on this but not answers. I thought I would post the solution here to help anyone else who may run into this ...
463 views

### Molecular Imaging - Any surprises to be had?

Molecular imaging, using STM and AFM technologies, appear so far to visually prove most of what we already know about chemical structures, such as VSEPR theory. For instance, here are the ideal ...
2k views

### Why is tantalum so unreactive?

What is the fundamental argument behind explaining why Ta metal is so inert and does not usually participate in corrosion? I know that it forms a protective oxide, but nothing explains why in an ...
30k views

### Effect of dillution on titration

When we are titrating acid/base using ph meter we add distilled water to immerse the ph electrode. Won't this affect the concentration of the acid/base: I mean isn't this dillution. Won't this ...
16k views

9k views

### Why are the halogens good disinfectants?

I've been searching around the internet for a while and I know that Chlorine, Bromine and Iodine are used as disinfectants. My question is, what is the property of the halogens that make them ...
83k views

714 views

### Why can't you see air but can feel it [closed]

Is there a device that can measure the air in the room in lbs? I would appreciate the anseer
25k views

### Why won't water freeze if you put ice in it, despite ice being frozen?

Just now I got some room temperature water and added some ice to cool it, and it just came to me, like the scientist I wish I was ... why doesn't frozen (freezing point) ice added to higher ...