Friday
December 13, 2013

Posts by Fai

Total # Posts: 102

Chemistry
A solution of is prepared by adding 50.3ml of concentrated hydrochloric acid and 16.6ml of concentrated nitric acid to 300ml of water. More water is added until the final volume is 1.00L. Calculate (H+) (OH) and the PH for this solution. Hint concentrated HCL is 38% hcl by mas...

chemistry
How to calculate PH 2.13 = 0.007M Why? Please show for me. I want you step by step for me.

chemistry
How to calculate PH 1.9 =0.0126M I do not still understand. I want you step by step to calculate for me. Thank you.

chemistry
Concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 hcl solution? My calculation 500ml x 1:200 =2.5 1:200 means 1gm/200ml 2.5 x 36.5 = 91.2...

chemistry
Concentrated hydrochloric acid has specific gravity of 1.18 and 36% hcl weight. What volume of concentrated hcl must be diluted to give 50 gm of 10 percent. My calculation 50gm x 0.1 = 5gm 5gm x 36.5 = 182.5 182.5 / 0.36 = 506.9 506.9 / 1.18 = 430 ml This is answer. I am not s...

chemistry
A 0.446g sample of an unknown monoprotic acid was titirated with 0.105M KOH the molar mass is 120g/mol. What is the PKA value? Who helps me to solve it for me. Step by step.

chemistry
I do not still understand how to calculate PH 1.9 = 0.0126M I want step by step to calculate for me. Thank you for your help.

chemistry
How to calculate PH 1.9 = 0.0126M Why? How to calculate PH 1.8 = ? How to calculate PH 20 = ? How to calculate PH 21 = ? Pls helps me

chemistry
A solution of sodium cyanide NACN has a PH of 12.10. How many grams of NACN are in 425ml of solution with the same PH? Please helps me to solve it for me

chemistry
A 0.446g sample of an unknown monoprotic acid was titrated with 0.105M KOH the molar mass is 120g/mol. What is the PKA value Who helps me to solve it for me. Please help

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