Aqueous solutions Definition and 15 Threads

A well known rate of reaction experiment is the reaction between sodium thiosulphate and Hydrochloric acid in which colloidal Sulphur is produced. Over time this obscures a cross placed beneath the reaction vessel. Reaction time can then be measured for various concentrations of thiosulphate...

Homework Statement >Which of the following aqueous solutions would test closet to 7 on the pH scale? $a) NaCl$, $b) Na_2CO_3$, $c) NaH_2PO_4$, $d) NaCN$ Homework EquationsThe Attempt at a Solution I don't understand this. So I tried writing chemical equations like for a), NaCl + H20 --> NaOH +...

In searching through the literature for the solubility of calcium oxalate, I came across this post https://www.researchgate.net/post/Are_there_any_organic_inorganic_solvents_for_dissolving_Ca-oxalate I am not sure where the people answering this question have gotten the information that calcium...

I have found a lot of data and graphs showing conductivity (micro-mhos) vs % by weight of various salt solutions. The salts for which graphs appear particularly linear are those of alkali Earth metals - eg sodium, potassium - KI, KBr, KCl etc. Is there a theoretical equation for conductivity vs...

Homework Statement If dilute, aqueous magnesium bromide is electrolyzed, one product is formed at each electrode. Identify the product, state the electrode it occurs at (anode or cathode) and state a reason for your choice of product. Homework Equations Mg2+(aq) + 2e- --> Mg(s) E°red = -2.37 V...

Determine the equilibrium pH of aqueous solutions for the following strong acids or bases: (a) 257mg/L of HSO4- ; (b) 10nM NaOH ; (c) 75ug/L of HNO3

Hey there, My textbook doesn't expand on this much and I'm unsure if I'm just not seeing some obvious connection; I'd appreciate it if someone could clarify this for me. I'm studying the Bronsted-Lowry theory and the strength of binary and ternary acids. I understand how, for example, H2SO4...

Homework Statement What are the final hydrogen ion concentration and pH of of a solution obtained by mixing 400 mL of 0.2 M NaOH with 150 mL of 0.1 M H3PO4? pKa's are 2.12, 7.21, 12.32 Homework Equations Henderson-Hasselbach: pH = pKa + log [b]/[a] The Attempt at a Solution 0.2 M...

Hy ! I have a problem and I need ur help.I tried to evaporate the water from a solution using the rotary evaporator but it didnt work.I don't know what i did wrong.Maybe u can help me or tell me which other method can I use? Thank u Greetings

This isn't a homework question but a general question which I should know the answer to but am not sure. If you have a basic/acidic compound and add it to water to form an aqueous solution, the water should turn basic/acidic respectively, right? no exception? Thank you

Homework Statement Classify each of these aqueous solutions as acidic, neutral, or basic. A. HI(aq) B. NaCl(aq) C. RbOH(aq) Homework Equations The Attempt at a Solution A. HI(aq) is acidic B. NaCl(aq) is neutral C. RbOH(aq) is basic Am I right, wrong?!

Chem problem need help... Homework Statement How would you prepare the following aqueous solutions? (a) 1.10 kg of 0.0515 m ethanol (C2H5OH) from ethanol and water Add___ g C2H5OH to ____ g H2O. (b) 511 g of 15.0 mass % HCl from 35.3 mass % HCl Add___ g of 35.3% HCl to ___ g of water...

In the textbook it stated "In aqeous solutions, the concentration of hydronium ions is always related to the concentration of hyroxide ions. Therefore we can still measure or calculate the pH of solutions of bases like NaOH, even though they are not acidic." The book also stated that pH is a...

– Advances in Science and Technology – Proceeings of the 14th International Conference on the Properties of Water and Steam Editors: Masaru Nakahara, Nobuyuki Matubayasi, Masakatsu Ueno, Kenji Yasuoka and Koichi Watanabe http://www.iapws.jp/proceedings.html Some very useful and...

Which of the following are correct statements ? a) In an aqueous solution of NH4Cl, H2O, NH4+ and Cl-are the major species present b) In an aqueous solution of NaCH3CO2, H2O, Na+ and HCH3CO2 are the major species present c) In an aqueous solution of HCN, H2O, H3O+...