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suter [353]
3 years ago
15

What does the symbol ka mean in chemistry?

Chemistry
2 answers:
Dmitry_Shevchenko [17]3 years ago
4 0
 <span>Ka is an equilibrium constant for the partial ionization of "weak" acids in water.</span>
goblinko [34]3 years ago
3 0
Ka is an equilibrium constant for the partial ionization of "weak" acids in water. If such a weak acid is HOAc, the ionization is 
<span>HOAc = H+ + OAc- </span>
<span>and Ka= [H+][OAc-]/[HOAc] </span>

<span>Ka values range from about 10-2 to 10-14 Greater than 10-2, they are essentially strong acids, and below 10-14, they produce no more [H+] in water than would normally be observed.

</span>
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Answer:

6.45 g of iodine, I₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Zn + I₂ —> ZnI₂

Next, we shall determine the mass of Zn and I₂ that reacted from the balanced equation. This can be obtained as follow:

Molar mass of Zn = 65 g/mol

Mass of Zn from the balanced equation = 1 × 65 = 65 g

Molar mass of I₂ = 127 × 2 = 254 g/mol

Mass of I₂ from the balanced equation = 1 × 254 = 254 g

SUMMARY:

From the balanced equation above,

65 g of Zn reacted with 254g of I₂.

Finally, we shall determine the mass of f I₂ needed to react with 1.65 g of Zn. This can be obtained as follow:

From the balanced equation above,

65 g of Zn reacted with 254g of I₂.

Therefore, 1.65 g of Zn will react with = (1.65 × 254)/65 = 6.45 g of I₂.

Thus, 6.45 g of iodine, I₂ is needed for the reaction.

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