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قديم 08-04-2008, 09:00 AM
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Express ppm and ppb on weight / weight , /volume and volume bases.

Calculate the grams of substance required to prepare the following solutions:
(A) 250ml of 5.00% (wt/vol) NANO3 b)500ml of 1.00% (wt/vol) NH4NO3.
( 1000ml of 10.0% (wt/vol) AgNO3 .

What is wt/vol % of the solute in each of the following solutions?(A)52.3g NA 2SO4/l
(b) 275g KBr in 500ml (c)3.65 g SO2 in 200ml .

Calculate the molar concentrations of all cations and anions a solution prepared by mixing 10.0 ml each of the following solutions: 0.100 m Mn (NO3)2 , 0100M kno3 AND 0.100 M K2SO4


A solution containing 10.0 mmol CaCL2 is diluted to 1 L. calculate the number of grams of CaCl2 per milliliter of of the final solutions

Calculate the molirty of each the following . solutions (a) 10.0g H2SO4 in 250 ml of solutions , (b) 6.00 g NaOH in 500 ml of solutions (c)25.0 g AgNO3 in 1.00l L solutions

Calculate the number of grams in 500 L of each of the following solutionsa) 0.100M
Na2SO4, (b)0.250M Fe(NH4)2(SO4)2 6H2O , (c)0.667M Ca(C9H6ON)2.

Calculate the grams of each substance required to prepare the following solutions: (A)250M of 0.100M KOH,(b) 1.00L of 0.0257M K2Cr2O7 , (C)500 ML of 0.0500M CuSO4.

Calculate the molirty of each of the following commercial acid or base solution : (a)70.0%HClO4, specific gravity 1.668 , (b)96.0% HNO3 specific gravity 1.409 , (c)85.0 % H3PO4, specific gravity 1.689 , (D)99.5% HC2H3O2(acetic acid ), specific gravity 1.051, (e)28.0% MH3, specific gravity 0.898 . (assume density and specific gravity are equal within three significant figures.)