Which part of an atom has most of its mass?

45.6 mL of 0.0600 M Ba(OH)2 is added to 25.0 mL of HCl of unknown concentration. What is the concentration of HCl?

Alex Ar [27]

45.6 mL of 0.0600 M of $Ba(OH)_{2}$ is added to 25.0 mL of HCl of unknown concentration then , the concentration of HCl is 0.032 M .

Calculation ,

Formula used : $M_{1} V_{1}$ = $M_{2} V_{2}$ ...( 1 )

Where $M_{1}$ = concentration of $Ba(OH)_{2}$ = 0.0600 M ( given )

$M_{2}$ = concentration of HCl = ? ( to be find )

$V_{1}$ = volume of $Ba(OH)_{2}$ = 25.0 mL ( given )

$V_{2}$ = volume of HCl = 45.6 mL ( given )

Now , put the value of all volume and concentration in equation ( 1 ) we get .

0.0600 M × 25.0 mL = $M_{2}$ × 45.6 mL

$M_{2}$ = 0.0600 M × 25.0 mL / 45.6 mL = 0.032 M

Therefore , concentration of unknown concentration of HCl is 0.032 M .

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7 0

1 year ago

Four modes of sediment transport are:

netineya [11]

Here is 5

Dissolved Load - elements dissolved in solution

Suspended Load - very fine grained sediment such as clay and silt carried in suspension. The size grains that can be carried in suspension are dependent on the current velocity

Wash Load - a subset of the suspension load, extremely small particles (clay) that will remain in suspension independent of turbulence in the river

Saltation Load - particles that are temporarily carried in suspension but move by bouncing along the bottom

Bed Load - sediment that moves by rolling or sliding along the bottom. These are generally the coarser grained sediments such as sand and gravel.

5 0

3 years ago

A neutral solution has a pH of: a. 1 b. 5 c. 7 d. 14

zavuch27 [327]

The answer is 7 my guy

3 0

3 years ago

Lead(II) nitrate is added slowly to a solution that is 0.0800 M in Cl− ions. Calculate the concentration of Pb2+ ions (in mol /

barxatty [35]

Answer:

$[Pb^{2+}]=3.9 \times 10^{-2}M$

this is the concentration required to initiate precipitation

Explanation:

$PbCl_2$ ⇄ $Pb^{2+}+2Cl^-$

Precipitation starts when ionic product is greater than solubility product.

Ip>Ksp

Precipitation starts only when solution is supersaturated because solution become supersaturated then it does not stay in this form and precipitation starts itself only solution become saturated.

This usually happens when two solutions containing separate sources of cation and anion are mixed together and here also we are mixing lead (||)nitrate solution(source of lead(||)) into the Cl- solution.

$Ip=[Pb^{2}][2Cl^-]^2=Ksp$

$Ksp=2.4\times 10^{-4}$

lets solubility=S

$[Pb^{2+}] = S$

$[Cl^-]=2S$

$Ksp=[Pb^{2+}]\times [Cl^-]^2$

$Ksp=S \times (2S)^2$

$Ksp=4S^3$

$S=\sqrt[3]{\frac{Ksp}{4} }$

$S=3.9\times 10^{-2}$

$[Pb^{2+}]=3.9 \times 10^{-2}M$ this is the concentration required to initiate precipitation

4 0

3 years ago

Which one of the following compounds will be least soluble in water?

algol [13]

Water is a polar solvent. Since, 'Like dissolves like' a polar compound will be most soluble in water whereas a non-polar compound will be the least soluble.

The increasing order of polarity for the given organic compounds is:-

CH3OCH3 < CH3NH2 < CH3CHO < CH3CH2OH

Ether is the least polar and hence least soluble in water.

8 0

3 years ago

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