K 2 + 2 + CrO 2 − 4 K22++CrO42− 2 K + + Cr 2 − + 2 O 2 2K++Cr2−+2O2 2 K + + CrO 2 − 4 2K++CrO42− no ions room formed


You are watching: When potassium chromate, k2cro4, dissolves in water, what ions are produced?


couchsurfingcook.com:

2 K⁺(aq) and CrO₄²⁻(aq)

Explanation:

Potassium chromate (K₂CrO₄) is a salt. When liquified in water, the is a strong electrolyte, the is, the dissociates to provide the cation potassium (K⁺) and also the anion chromate (CrO₄²⁻). The corresponding balanced equation is:

K₂CrO₄(aq) → 2 K⁺(aq) + CrO₄²⁻(aq)





Two objects are dropped right into beaker v layers of oil, rubbing alcohol, water and corn syrup. These objects space made that the sam
It all depends on the objects" densities ,because if they"re less thick than the oil they will not even sink to the bottom of the beaker

couchsurfingcook.com:

Mass of Ni = 4.14 grams

Explanation:

Molar fixed : the is the amount of substance existing in 1 mole the the molecules.

Moles : it is the amount that has as numerous atoms as existing in 12 gram of C-12. This is equal to Avogadro Number .

*

*

Molar mass of Ni = 58.69 g/mole

Moles can be calculation by 2 formula:

*

*
........(1)

And ,

*

*
.........(2)

Comparing equation 1 and 2

*

*

*

M = 58.69 g/mole

Put these worth in the formula and solve for m

*

*

*

*

m = 4.14 gram

Mass of Ni = 4.14 grams

Second technique :

Find the moles very first using :

*

Then put value that n in the formula(1) and also solve for m

*
........(1)


7 0
9 months ago
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