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earnstyle [38]
3 years ago
11

According to the pH chart, which is the strongest base?

Chemistry
2 answers:
Lynna [10]3 years ago
6 0

Answer : The correct option is, (B) NaOH

Explanation :

Indicators : It is a substance that gives the visible sign by the color change of the chemical species like an acid or a base.

Universal Indicator : It changes color when mixed with an acid or base.

Universal Indicator turns red when it is added to a strong acid, it turns blue or purple when it is added to a strong base and it turns a yellowish-green when it is added to a neutral solution.

The pH range is, 1 to 14.

When the value of pH is less than 7 then the solution is acidic.

When the value of pH is more than 7 then the solution is basic.

When the value of pH is equal to 7 then the solution is neutral.

According to the pH chart, HCl is a strong acid whose pH is 1, saliva is also an acid whose pH is less than 7 that is 6.8. NaOH is a strong base whose pH is 14. The blood is slight basic in nature and the pH of blood is 7.4.

Hence, the strongest base is, (B) NaOH

Gnoma [55]3 years ago
4 0

Answer:

NaOH

Explanation:

HCl is a strong acid

Blood has a pH around 7.35, making it only slightly basic

Saliva has a pH around 6.7, making it slightly acidic

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Which of the following is NOT an example of a chemical change?
Katyanochek1 [597]

Answer:

hi there !!

B) Water evaporates into steam.

this is correct because only physical state changes, steam can be cooled down to get water again.

4 0
3 years ago
Read 2 more answers
What is the frequency of red light with a wavelength of 645 nm?
marin [14]

Answer:

4.64E14

Explanation:

First convert 645 nm to m = 6.4500E-7m. The equation for finding v with these values is the speed of light/wavelength. so 2.998E8/6.4500E-7m.

so your v or frequency would equal 4.64E14

Fun fact you know this is visible light because the visible light range is within the E14 range.

4 0
2 years ago
I need help plz this is driving me crazy
Elis [28]
A= 6 
B= 2
C= 1
D= 5
E= 3
F= 4
4 0
3 years ago
What is the molecular formula of a compound containing 89% cesium (Cs) and 11% oxygen (O) with a molar mass = 298 g/mol?
Maurinko [17]
M(Cs)=133 g/mol
M(O)=16 g/mol
M(CsxOy)=298 g/mol
w(Cs)=0.89
w(O)=0.11

CsxOy

x=M(CsxOy)w(Cs)/M(Cs)
x=298*0.89/133=2

y=M(CsxOy)w(O)/M(O)
y=298*0.11/16=2

Cs₂O₂  cesium peroxide
6 0
3 years ago
Read 2 more answers
To determine the freezing point depression of a LiCl solution, Toni adds 0.411 g of LiCl to the sample test tube along with 19.7
Cerrena [4.2K]

Answer:

LiCl = 0.492 m

Explanation:

Molal concentration is the one that indicates the moles of solute that are contained in 1kg of solvent.

Our solute is lithium chloride, LiCl.

Our solvent is distilled water.

We do not have the mass of water, but we know the volume, so we should apply density to determine mass.

Density = mass / volume

Density . volume = mass

1 g/mL . 19.7 mL = 19.7 g

We convert g to kg → 19.7 g . 1 kg / 1000g = 0.0197 kg

Let's determine the moles of LiCl

0.411 g . 1 mol / 42.394 g = 9.69×10⁻³ moles

Molal concentration (m) = 9.69×10⁻³ mol / 0.0197 kg → 0.492 m

7 0
2 years ago
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