Which Bond is the Least Polar? a) H-O b) H-F c) H-I d) H-H

Carbonic acid, H2CO3, has two acidic hydrogens. A solution containing an unknown concentration of carbonic acid is titrated with

stepan [7]

Answer:

1) Net ionic equation :

$2H^+(aq)+2OH^-(aq)\rightarrow 2H_2O(l)$

2) 0.765 M is the molarity of the carbonic acid solution.

Explanation:

1) In aqueous carbonic acid , carbonate ions and hydrogen ion is present.:

$H_2CO_3(aq)\rightarrow 2H^+(aq)+CO_3^{2-}(aq)$ ..[1]

In aqueous potassium hydroxide , potassium ions and hydroxide ion is present.:

$KOH(aq)\rightarrow K^+(aq)+OH^{-}(aq)$ ..[2]

In aqueous potassium carbonate , potassium ions and carbonate ion is present.:

$K_2CO_3(aq)\rightarrow 2K^+(aq)+CO_3^{2-}(aq)$ ..[3]

$H_2CO_3(aq)+2KOH(aq)\rightarrow K_2CO_3(aq)+2H_2O(l)$

From one:[1] ,[2] and [3]:

$2H^+(aq)+CO_3^{2-}(aq)+2K^+(aq)+2OH^{-}(aq)\rightarrow 2K^+(aq)+CO_3^{2-}(aq)+H_2O(l)$

Cancelling common ions on both sides to get net ionic equation :

$2H^+(aq)+2OH^-(aq)\rightarrow 2H_2O(l)$

2)

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $H_2CO_3$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is KOH.

We are given:

$n_1=2\\M_1=?\\V_1=50.0 mL\\n_2=1\\M_2=3.840 M\\V_2=20.0 mL$

Putting values in above equation, we get:

$M_1=\frac{1\times 3.840 M\times 20.0 mL}{2\times 50.2 mL}=0.765 M$

0.765 M is the molarity of the carbonic acid solution.

6 0

3 years ago

Describe in detail how you would determine the density of a potato that is too large to fit into a graduated cylinder. (Hint: Th

Mnenie [13.5K]

Answer:

The density of a potato is $\dfrac{M}{V'}$

Explanation:

Given that,

A potato that is too large to fit into a graduated cylinder.

Let us consider the mass of potato is M and volume of entire potato is V'.

The volume of water is V.

We know that,

Density :

The density is equal to the mass divided by volume.

In mathematically,

$\rho=\dfrac{m}{V}$

Where, m = mass

V = volume

We need to calculate the volume of potato

Using formula for volume

$V'=V''-V$

Where, V' = volume of potato

V''=Volume of combine water and potato

V = volume of water

We need to determine the density of a potato

Using formula of density

$Density\ of\ potato=\dfrac{Mass\ of\ potato}{volume\ of\ entire\ potato}$

Put the value into the formula

$\rho=\dfrac{M}{V'}$

Hence, The density of a potato is $\dfrac{M}{V'}$

7 0

3 years ago

What color would a solution that contains more OH- moles than H3O+ moles cause a phenol red indicator to turn?

Salsk061 [2.6K]

Answer:

i would say red

Explanation:

im learning about this right now lol actually. <3

3 0

2 years ago

Read 2 more answers

The charge of the stable ion of S and Li?

balandron [24]

Answer:

sulfur will have a chafge of -2 and Lithium will have a charge of +1

3 0

3 years ago

A student attempts to measure the specific heat capacity of an unknown liquid through repeated trials. She measures its specific

Goryan [66]

Answer:

2.13

Explanation:

4 0

3 years ago