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Kitty [74]
2 years ago
6

Which of the following is the term used to describe a set of elements whose properties tend to be largely predictable based on p

osition on the periodic table?
Chemistry
2 answers:
lys-0071 [83]2 years ago
8 0
Group.... because elements in a group have same chemical properties
Airida [17]2 years ago
7 0

Explanation:

Elements which belong to same group show similar chemical properties.

This is because elements that lie in the same group have same number of valence electrons. Hence, they tend to show same type of reactivity which makes them exhibit similar chemical properties.

As chemical properties are defined as the properties which tend to show difference in chemical composition of a substance.

For example, toxicity, reactivity, combustion etc are all chemical properties.

Thus, we can conclude that group is the term used to describe a set of elements whose properties tend to be largely predictable based on position on the periodic table.

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Sergio [31]
8/5lit.. of 12M NaOH
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7 0
3 years ago
You are given sodium acetate, 1m hcl, nahco3 and na2co3. Determine which of these four you would need and then show calculations
valentina_108 [34]

solution:

the given compounds are sodium acetate, 1M HCL,NaHCO₃ and Na2CO₃

pH of the buffer solution is 4.7

the value of pKa of sodium bicarbonate is 6.37

the value of pKa of acetic acid is 4.7

calculate concentration of acetic acid by using the following forumula

pH=pKa+lag[salt]/[acid]

substitute the pH and Pka values in the formula.

4.7=4.7+log[salt]/[acid]

log[salt]/[acid]=0

thus, the concentration ratio of the salt and acid should be equal to each other.

Thus, concentration of sodium acetate is 0.05M

Concentration of sodium acetate= concentration of acid

= 0.05M

Volume of the buffer solution is 100mL

The buffer solution can be prepared as 0.05M of 50mL sodium acetate will react with 0.05M of 50mL of 0.05M of HCL.

The chemical equation for neutralization of the weak base with strong can be represented as show as

CH₃COONa+HCL-->CH₃COOH+NaCL


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