Chemistry, 20.10.2020 16:01 citiboy45

4. What reagent would you predict to be in excess for reacting 7.50 mL of a 0.10M BaCl2 solution with 7.50 mL of 0.10M KIO3 solution

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Answer from: kajjumiaialome

Answer : BaCl_2 reagent predict to be in excess.

Explanation : Given,

Concentration of BaCl_2 = 0.10 M

Volume of BaCl_2 = 7.50 mL = 0.0075 L (1 L = 1000 mL)

Concentration of KIO_3 = 0.10 M

Volume of KIO_3 = 7.50 mL = 0.0075 L

First we have to calculate the moles of BaCl_2 and KIO_3 .

$\text{Moles of }BaCl_2=\text{Concentration of }BaCl_2\times \text{Volume of }BaCl_2$

$\text{Moles of }BaCl_2=0.10M\times 0.0075L=0.00075mol$

and,

$\text{Moles of }KIO_3=\text{Concentration of }KIO_3\times \text{Volume of }KIO_3$

$\text{Moles of }KIO_3=0.10M\times 0.0075L=0.00075mol$

Now we have to calculate the excess and limiting reagent.

The balanced equilibrium reaction will be:

$BaCl_2+2KIO_3\rightleftharpoons Ba(IO_3)_2+2KCl
$

From the balanced reaction we conclude that

As, 2 mole of KIO_3 react with 1 mole of BaCl_2

So, 0.00075 moles of KIO_3 react with $\frac{0.00075}{2}=0.000375$ moles of BaCl_2

From this we conclude that, BaCl_2 is an excess reagent because the given moles are greater than the required moles and KIO_3 is a limiting reagent and it limits the formation of product.

Hence, BaCl_2 reagent predict to be in excess.

Answer from: Quest

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

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5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

Write 15 uses of a mercury barometer along with its characterestics

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4. What reagent would you predict to be in excess for reacting 7.50 mL of a 0.10M BaCl2 solution wit...

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