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You are gien a group I unkown and are told that it contains only one cation. You treat it with HCL and get a white precipitate, and then you wash the precipitate with cold water. You are allowed to treat the washed precipitate with one more reagent. By observing what happens when this one reagent is added you should be able to decide, within seconds, what cation is present in your unknown.
What one reagent is added?
When this reagent is added, what would you observe if your unknown contains:a. Ag+
b.Pb+
c.Hg22+
which of the following shows the acids in order from strongest to weakest? The order of atomic radii is I > Br > Cl
How do you write and balance this chemical equation a mixture of benzoic acid (C7H6O2 or C6H5COOH) and 4-t-butylphenol (CH3)3CC6H4OH
What wieght of glycine (pka1=2.4, pka2=9.6) and what volume of 0.5 N(normality) HCl would be necessary to make 100 mL of 0.2 M buffer pH 2.4?
If 114 grams of CS2 are burned in an excess of O2 (an amount sufficient to burn completely all 114 g of CS2), how many moles of SO2 are formed?
An aqueous solution of KCl is colorless, KMnO4 is purple, and K2Cr2O7 is orange. What color would you expect of an aqueous solution of Na2Cr2O7? Explain.
If carbon dioxide gas is collected over water at 25°C and 775 torr, what is the partial pressure of the CO2? The vapor pressure of water is 23.8 torr at 25°C.
at 700k the equilibrium constant kc for the gas phase reaction between no and o2 forming no2 is 8.7x 106 the rate
what volume of hydrogen at STP is produced from the reaction of 50.0g of Mg and the equivalent of 75g of HCl?
Calculate the standard free-energy change at 25 ^ \circ \rm C for the following reaction using the table in the introduction
how many grams of mercury (II) oxide are needed to create 28.9 grams of oxygen gas?
a particle has a velocity equal to 0.25 c and a wavelength of 1.3 x 10^-16 m. Calculate the mass of the particle in kilograms. c=3.0 x 10^8 m/s
You have samples of approximately 8mL solution with ph ranging from 4 to 10. Calculate the volume of 1M HCIO4 needed to lower the ph to 2.5.
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