Alkalis and bases differentiation

AI Thread Summary
The discussion centers on the distinction between bases and alkalis, specifically regarding Sodium Oxide and Lithium Hydroxide. It is clarified that alkalis are defined as soluble bases. Sodium Oxide, when in solid form, is not classified as an alkali; it becomes an alkali only when dissolved in water, forming Sodium Hydroxide, which is indeed an alkali due to its ability to produce hydroxide ions (OH-) in solution. Similarly, Lithium Hydroxide is considered an alkali in its dissolved state. The key takeaway is that both Sodium Oxide and Lithium Hydroxide are only classified as alkalis when they are in aqueous solution, contributing to a pH greater than 7 due to the presence of hydroxide ions.
Udhaya
Messages
1
Reaction score
0
Hi, I have a doubt on the topic of bases and alkalis. I have learned that a alkali is a soluble base so does that mean Sodium Oxide(Solid) is a alkali and Lithium Hydroxide(Solid) is a alkali. Or are they considered alkali when they are dissolved? For example, Sodium Oxide becomes sodium hydroxide which is alkali in aqueous form.
 
Chemistry news on Phys.org
I believe that they would still be considered as alkali when dissolved as it would result in a solution that had a pH higher than 7, it would be that OH- ions that would cause the alkaline pH which are from that hydroxide in this case.
 

Thread 'Humidity of a saturated NaCl solution with anticaking additive'

I want to test a humidity sensor with one or more saturated salt solutions. The table salt that I have on hand contains one of two anticaking agents, calcium silicate or sodium aluminosilicate. Will the presence of either of these additives (or iodine for that matter) significantly affect the equilibrium humidity? I searched and all the how-to-do-it guides did not address this question. One research paper I found reported that at 1.5% w/w calcium silicate increased the deliquescent point by...
View full post »

Thread 'Why does having 8 valence electrons make an element inert?'

I was introduced to the Octet Rule recently and make me wonder, why does 8 valence electrons or a full p orbital always make an element inert? What is so special with a full p orbital? Like take Calcium for an example, its outer orbital is filled but its only the s orbital thats filled so its still reactive not so much as the Alkaline metals but still pretty reactive. Can someone explain it to me? Thanks!!
View full post »

Thread 'Resists for etching Aluminium with NaOH'

I'm trying to find a cheap DIY method to etch holes of various shapes through 0.3mm Aluminium sheet using 5-10% Sodium Hydroxide. The idea is to apply a resist to the Aluminium then selectively ablate it off using a diode laser cutter and then dissolve away the Aluminium using Sodium Hydroxide. By cheap I mean resists costing say £20 in small quantities. The Internet has suggested various resists to try including... Enamel paint (only survived seconds in the NaOH!) Acrylic paint (only...
View full post »

Similar threads

Aqueous solution of tolyltriazole
Replies
3
Views
1K
Is litmus test a reliable criterion for classifying compounds as acids or bases?
Replies
11
Views
4K
Resists for etching Aluminium with NaOH
Replies
3
Views
84
Chemistry Thoughts on Introduction to Chemistry fourth Edition by Bauer?
Replies
1
Views
2K
About Sodium Carbonate(Definition of base)
Replies
7
Views
13K
Very confused about Naunyn definition of acid and base
Replies
3
Views
2K
What Is the White Powder from Ultrasonic Humidifiers and Is It Harmful?
Replies
43
Views
12K
Complete thermal decomposition of specific compounds
Replies
4
Views
3K
Seeking White Powder Alkali Indicator (that can take 900°C)
Replies
7
Views
2K
Electrodialysis with different anions
Replies
1
Views
1K

Hot Threads

Recent Insights

Back
Top