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3 years ago

What mass of water must be added to 5g of nacl to make 5% mass persentage of the solution?

Chemistry

1 answer:

Vitek1552 [10]3 years ago

8 0

Answer:-

95 grams

Explanation:-

Let the mass of water to be added be M

So total mass = 5 + M

So 5% of this solution has 5g of NaCl by mass.

∴ (M+5) x (5/100) = 5

M+5 = 5 x 100/5

M+5=100

M= 100-5

So amount of water to be added is 95 gram

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A 20.0 milliliter sample of 0.200 molar K₂CO₃ solution is added to 30.0 milliliters of 0.400 molar Ba(NO₃)₂ solution. Barium car

sveticcg [70]

Answer:

0.32M

Explanation:

Step 1: Balance the reaction

K2CO3 + Ba(NO3)2 ⇔ KNO3 + BaCO3

We have a 20 mL 0.2 M K2CO3 and a 30mL 0.4M Ba(NO3)2 solution

SinceK2CO3 is the limiting reactant, there will remain Ba(NO3)2 after it's consumed and produced KNO3 + BaCO3

Step 2: Calculate concentration

To find the concentration of the barium cation we use the following equation:

Concentration = moles of the solute / volumen of the solution

[Ba2+] = (20 * 10^-3 * 0.2M + 30 * 10^-3 * 0.4M) / ( 20 + 30mL) *10^-3

[Ba2+] = 0.32 M

The concentration of Barium ion in solution is 0.32 M

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2 years ago

Water is known as the "universal solvent." What is the best synonym for "solvent?"

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Solvent- generally in liquid form – are used to dissolve, suspend or extract other materials, usually without chemically changing either the solvents or the other materials. this means the answer is A

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3 years ago

5. What happens to the mass when you change the volume? It decreases

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What is milk best described as? solution, suspension, compound, or colloid?

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Bicarbonate concentrate mixers may have a which are replaced on a routine basic.

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Answer: True the bicarbonate mixture can help save time and few routine.

Explanation:

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The answer to the above is true the bicarbonate mixture can help save time and few routine.

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3 years ago