How do you test pH levels in bottled water?

1 answer:

8 0

You can use a universal indicator. The color of the universal indicator before contact with other chemicals is green, which is the pH of 7. We know that bottled water is pH 7. So when we put a few drops of universal indicator, the color would be green indicating neutral pH.

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Plz. 50 points and brainliest

Fittoniya [83]

Answer:

Concentration of solution B is

Explanation:

Solution A: Total volume of solution A = (9.00+1.00) mL = 10.00 mL

According to law of dilution,

where and are initial and final concentration respectively. and are initial and final volume respectively.

Here = , = 1.00 mL, = 10.00 mL

So, =

So, concentration of solution A =

Solution B: Total volume of solution B = (2.00+8.00) mL = 10.00 mL

Similarly as above, =

So, concentration of solution B =

Explanation:

Hope this helps:)

3 0

3 years ago

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A flask contains 5.0g of neon gas at a temperature of 35°C. The pressure gauge indicates 0.37atm inside the flask. What is the v

DaniilM [7]

Answer:

The volume of the neon gas is 17.07 L.

Explanation:

The ideal gas equation describes the relationship among the four variables P, V, T, and n. An ideal gas is a hypothetical gas whose pressure-volume-temperature behavior can be completely accounted for by the ideal gas equation.

In order to calculate the volume, first we need to convert the grams of neon to moles:

28.18 g Ne ------ 1 mol Ne

5.0 g Ne---------- x= 0.25 mol Ne

Now, using the ideal gas equation we calculate the volume:

$pV= nRT$