All categories

3 years ago

Which ion, when combined with chloride ions, Cl-, forms an insoluble substance in water?

Chemistry

2 answers:

n200080 [17]3 years ago

8 0

Answer is (3) - Pb²⁺.

<em>Explanation;</em>

Among the given choices PbCl₂ is insoluble in water. But it can be soluble in hot water. It appears as white precipitate. The Ksp of PbCl₂ is very small. That's why it is insoluble in water.

Fe²⁺ + 2Cl⁻ → FeCl₂ (soluble in water. Forms pale green color solution)

Mg²⁺ + 2Cl⁻ → MgCl₂ (soluble in water. Forms clear colorless solution)

Pb²⁺ + 2Cl⁻ → PbCl₂ (poorly soluble in water. Forms white precipitation)

Zn²⁺ + 2Cl⁻ → ZnCl₂ (soluble in water. Forms clear colorless solution)

Contact [7]3 years ago

5 0

Pb2 + is the ion, when combined with chloride ions, CI-, forms an insoluble substance in water.

You might be interested in

The common titanium alloy known as T-64 has a composition of 90 weight% titanium 6 wt% aluminum and 4 wt% vanadium. Calculate th

Anna007 [38]

Explanation:

Suppose in 100 g of alloy contains 90% titanium 6% aluminum and 4% vanadium.

Mass of titanium = 90 g

Moles of titanium = $\frac{90 g}{47.87 g/mol}=1.8800 mol$

Total number of atoms of titanium , $a_t=1.8800 mol\times N_A$

Mass of aluminum = 6 g

Moles of aluminium = $\frac{6 g}{26.98 g/mol}=0.2223 mol$

Total number of atoms of aluminium, $a_a=0.2223 mol\times N_A$

Mass of vanadium = 4 g

Moles of vanadium= $\frac{4 g}{50.94 g/mol}=0.0785 mol$

Total number of atoms of vanadium $a_v=0.0785 mol\times N_A$

Total number of atoms in an alloy = $a_t+a_a+a_v$

Atomic percentage:

$Atomic\%=\frac{\text{total atoms of element}}{\text{Total atoms in alloy}}\times 100$

Atomic percentage of titanium:

: $\frac{a_t}{a_t+a_a+a_v}\times 100=\frac{1.8800 mol\times N_A}{1.8800 mol\times N_A+0.2223 mol\times N_A+0.0785 mol\times N_A}\times 100=86.20\%$

Atomic percentage of Aluminium:

: $\frac{a_a}{a_t+a_a+a_v}\times 100=\frac{0.2223 mol\times N_A}{1.8800 mol\times N_A+0.2223 mol\times N_A+0.0785 mol\times N_A}\times 100=10.19\%$

Atomic percentage of vanadium

: $\frac{a_v}{a_t+a_a+a_v}\times 100=\frac{0.0785 mol\times N_A}{1.8800 mol\times N_A+0.2223 mol\times N_A+0.0785 mol\times N_A}\times 100=3.59\%$

6 0

4 years ago

Brass is an alloy of copper and zinc. varying the mass per- centages of the two metals produces brasses with different proper- t

EastWind [94]

First step: The mass of zinc in the yellow zinc sample can be calculated with the help of percentage (given) in the sample. After that, mass of copper is determine by the subtracting the mass of zinc from the total mass of zinc in the given sample.

Thus,

Mass of zinc in 34% zinc sample = $185 g yellow zinc \times \frac{34 zinc}{100 yellow zinc}$

= $62.9 g$ zinc

Mass of zinc in 37% zinc sample = $185 g yellow zinc \times \frac{37 zinc}{100 yellow zinc}$

= $68.45 g$ zinc

Now,

mass of copper in 34% zinc sample = $185 g -62.9 g$

= $122.1 g \simeq 122 g$

mass of copper in 37% zinc sample = $185 g -68.45 g$

= $116.55 g \simeq 117 g$

Thus, the range of mass of copper is $117 g$ to $122 g$

Second step:

34% zinc sample consist of 66% copper (100-34= 66%)

37% zinc sample consist of 63% copper (100-37=63%)

Mass of zinc = $(46.5 g copper) \times \frac{34 percent zinc}{66 percent copper}$

= $23.95 g\simeq 24 g$

Mass of zinc = $46.5 g copper \times \frac{37 percent zinc}{63 percent copper}$

= $27.30 g\simeq 27g$

Thus, the range of mass of zinc is $24 g$ to $27 g$

7 0

4 years ago

Yoshine high waisted leggings contact number 6299325726//6299325726

natima [27]

Answer:

bro both are same to same

Explanation:

If you dail any number

6 0

3 years ago

Read 2 more answers

What kind of chemical bond exists between two nitrogen atoms to form nitrogen gas? Is this a strong or weak bond? When a chemica

ira [324]

Answer:

pure covalent bond ( inter atomic bond)

Explanation:

pure covalent exists between atoms of the same kind..two nitrogen atoms have the same electronegativity values hence cancel out making it a pure or non polar covalent bond

7 0

3 years ago

Draw Lewis structures for each of the following moecules. Show resonance structures, if they exist

Svetllana [295]

A Lewis structure is a visual representation of the bonds between atoms and it shows the lone pairs of electrons in molecules. This structure is also referred as Lewis dot diagram. Resonance structure are multiple Lewis structure that describe a single molecule.<span>
</span>

6 0

3 years ago