I need to prepare SnCl2 solution in water. I have to maintain pH 6, which buffer is suitable to fix this pH.
As Sn+2 is very hydrolyzing salt in water.
Can anyone explain the procedure to make the solution?
In galvanic industry we sometimes use citric acid/citrate system to keep up the Sn++ also at pH 5; it should work in your conditions too.
To prepare it suggstion is to start from acid environment where Sn is as ion and then step by step reach the more basic conditions
Please try this:
1) Dissolve e.g. 0.75 g. of stannous chloride dihydrate (SnCl2. 2H2O) in water and dilute to 50 mL.
2) Dissolve 5 g. of citric acid monohydrate , 1.2 mL of acetic acid, 12 g. of sodium acetate trihydrate, and 3.4 g. of sodium hydroxide in water & dilute to 100 mL with water. Mix this solution with 20 mL of water & 30 mL of 1-propanol. You have now a buffer solution with pH=6 & it is stable for several weeks at 4 oC. Confirm this by pH meter.
Mix both solutions & proceed to your experiment. Note that distilled water is only used.
If it works, then scale up as you wish, e.g. by using 10 times the amounts. Best wishes for success.
Another oprtion would eb to dissolve stannous chloride in Methanol, if it si compatible with your labelling procedure. Stannous chloride is surprisingly soluble in it
- Badges
- Science topic
- Similar topics
- Biological Science
- Biochemistry
- Biochemical Techniques
- Analytical Chemistry
- pH