Why is salt needed when using vinegar to clean pennies?
2012年12月13日 · Salt plus water plus vinegar is the combination which cleans the copper. THAT is an extremely strong experimental argument for why adding salt to vinegar shifts the …
physical chemistry - Why is it important to use a salt bridge in a ...
If you break the salt bridge, same thing. The salt bridge is a "wire," but it is an Electrolytic Conductor, same as any salt water. Go search on: metallic conductivity (mobile electrons,) …
everyday chemistry - How pure NaCl is typical table salt? How is it ...
2015年2月9日 · One salt company (WA Salt supply) lists "typical" purities for the table salt it provides at 99.72%; this salt contains uses Tivolex. Morton Salt claims that their iodized table …
Is an acid a salt or not? - Chemistry Stack Exchange
2019年7月11日 · In chemistry, a salt is an ionic compound that can be formed by the neutralization reaction of an acid and a base. Let's take, for example, carbonic acid: it is a …
What happens inside salt bridges? - Chemistry Stack Exchange
2021年4月19日 · Ions leave the salt bridge and move further, without accumulating at the bridge end. For all salt bridges where there is no other reactions involved, so all simple salts in …
Density range of table salt? - Chemistry Stack Exchange
2020年8月26日 · A pure $\ce{NaCl}$ crystal has a density of $\pu{2.16 g/cm^3}.$ However, the salt granules in table salt don't pack perfectly — there's a lot of air mixed in. I carefully …
(At what temperature) can salt evaporate? - Chemistry Stack …
2017年3月8日 · As also stated in the article, such a pressure exists even above a solid, though much smaller. So in that sense, a partial evaporation of salt takes place at any temperature. A …
Why does ice water get colder when salt is added?
It is well known that when you add salt to ice, the ice not only melts but will actually get colder. The melting process is at the interface of liquid and solid, so both the solution and the ice will …
ionic compounds - How is NH4Cl a salt? - Chemistry Stack Exchange
2016年9月9日 · So what I know is, a salt is an ionic compound between a metal and a non-metal which exchange electrons. Like in $\ce{NaCl}$, $\ce{Na}$ is the metal and $\ce{Cl}$ is the non …
Why use a salt bridge at all in an electrochemical cell?
2015年3月22日 · A salt bridge will allow the movement of ions. Electrons flow from anode to cathode.Due to this a negative charge will be developed in the cathode and a positive charge …