# hcl

1. ### aqua regia from HCL and sulfuric acid?

i have 4 l of spring water, 200 ml clear concentrated HCL (muriatic acid), and 20-100 ml clear concentrated sulfuric acid (H2S04). is there a way to turn the sulfuric acid to nitric acid so i have aqua regia? total newbie
2. ### Finding pH of solution (KOH, HCl, NaCl)

Solution made of 230 mg KOH 8.71 ml 0.802 mol/l solution of HCl 3 g m/m% NaOH = 3.97 diluted to 618 ml m/m% is weight percent of substance. What is pH of this solution?
3. ### What's the best flux liquid for soldering copper onto stainless steel, HCl or H3PO4?

What's the best flux liquid for soldering copper onto stainless steel, HCl or H3PO4, with how many percent concentration of each ? How's logical explanation on solder sticking process will actually work some suggest Phosphoric acid better, actually I tried both works, ...many thanks in advance !
4. ### HCl dilution to non hazardous - formulas?

Hi there, I am completely new to Chemistry and have to complete a paper with 10 questions as part of a safety degree but this is well outside my current knowledge as it has been 30 years since high school. I WOULD really appreciate some help in where to start on the questions below. Are there...
5. ### Difference between liquid HCl and a solution of HCl

I know that HCl is a compound whose 1 molecule is composed of 1 hydrogen and 1 chlorine atom bonded co-valently to each other, the bond being polar co-valent. It exists in gaseous state at room temperature. When HCl gas is dissolved in water, it dissociates to furnish H+ ions and thus HCl...
6. ### acetone + hcl

Hello, Can anyone help me with the result of this equation? Acetone + hcl? Thanks
7. ### Reaction between HCL and Mg.

Hi, I've been stuck on a problem for hours now and I'm not sure how exactly to begin. The problem is as follows: In the reaction between hydrochloric acid and magnesium metal, hydrogen ions are consumed. Imagine a 0.50 g strip of magnesium is added to 1 L of a 0.0500 M hydrochloric acid...
8. ### Titration Of An HCl And H3PO4 Mixture

It is desired to determine the content of Ca3 (PO4) 2 in a mineral, 0.505 g and was added 50 mL of 0.05 Ma HCl (excess), which leads all the phosphate to phosphoric acid . The resulting solution is then titrated with NaOH 0.04 Ma requiring 13.66 mL to reach the first equivalence point and 16.28...
9. ### methylamine hcl synthesis?

hi guys! first post :) just came across this synth for methylamine hcl, just wondering if anyone has tried it or knows if it is legit, as people have told me it doesn't work? thanks in advance for any replies! http://www.youtube.com/watch?v=8qC9kq02250...
10. ### Calculate volume of HCl needed to change buffer pH by 1 unit???

How do you calculate the amount of HCl needed to change the pH of a NH3/NH4+ buffer by 1 unit? There was 100mL of NH3 2M and 10.698g of NH4 0.5M and then this was mixed with 400mL of water to make 500mL buffer solution. Only 80mL of this was used for each trial. HCl was 1M. Starting pH was...
11. ### Very dilute concentration HCl -> calculate pH

HCl + H2O -> H3O+ + Cl- [HCl] initial = 7.4x10^-8 I thought H3O+ would be 1x10^-7 because [OH-] and [H+] should be in equilibrium / equal so Kw = 1 x 10^-14 = [H+]^2 => [H+] = 1x10^-7 I did the ICE box, solved for x, took -log of it, and ended up with a pH of 7.13 it doesn't make sense...
12. ### Enthalpy reaction of NaHCO3 and HCL

Could someone help me with the last part of calculating the enthalpy? This is what I have so far A 100 cm3 of 2 mol dm-3 hydrochloric acid was poured into a polystyrene cup. 14 grams of sodium bicarbonate was added with. Initial temperature was 21.0 C and final temperature was 12.0 C. The...
13. ### Ionization of HCl

In this problem, I'm asked to find the ionization of HCl I wrote it as: HCl + H2O --> H3O^+ + Cl^- but in my book I see it written as: HCl --> H^+ + Cl^- is this another way of writting it? Also,when writing these equations out in general does it matter in what order you write out the...
14. ### Make acid basic by adding water?

My supervisor (PhD supervisor) has asked me to calculate how much HCl to add to water to give a basic pH (a series of dilutions, pHs 7, 8, 9 and 10). However, I am not a chemist by any means, I am a biologist and I always thought that you could not make an acid basic by adding water! Could...
15. ### Interesting Exothermic Reaction

I have a question about the reaction that occurs when roughly equal amounts of DMSO + HCl + H2O2 (~15%) are combined in a small tube. I did this, and the tube instantly became warm. I set it aside, then about 3 minutes later I heard a hissing sound. The liquid was boiling violently. It did this...
16. ### What type of reaction is Zn(s)+HCl

Hi What type is the reaction is below. I had to get data from another student in ChemII lab but I feel like what I got is incorrect. Since I didn't see or do the reaction, I'm not sure. The internet has conflicting info as answers.... Zn(s) + 2HCl(aq)-> ZnCl2(??) + 2H(??) I read that this is...
17. ### Manufacture of phosphoric acid

Phosphoric acid is made by reacting the rock phosphate with Hcl. The components of phosphate rock is: Components weight% P2O5 34.55 CaO 48.67 Al2O3+Fe2O3 3.76 MgO 1.29 SiO2 5.58 CaF2 2.50...
18. ### Redox processes (HCl electrolysis using Cu electrodes)

Hei! I will try to explain the task: I've have to write, what kind of redox processes takes place at the inert electrode (it needs to write anode and cathode reactions), where happens the electrolysis of hydrochloric acid using copper electrodes. Also needs to solve breakdown voltage U, but...
19. ### pH problem with HCL and NaOH?

anyway me and my friend both got different answers. In an acid-base titration. 1.0 mol litre hcl(from burette) is added slowly to 20 ml of 1.0 mol litre solution of NaOh in conical flask. a) calculate the pH of the solution in the conical flask after 19.90ml of HCL has been added. b) calculate...
20. ### equilibrium NH4 and HCL

Greetings Everyone! I am having an issue with this reaction NH4CL(s)-->NH4+(aq) + Cl-(aq) <-- I am trying to figure out what happens when I add HCL to it. Essentially, what is my stress, solution, and which way do I shift? Thanks for any help, comments, or suggestions