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3 years ago

Pure acid is to be added to a 5% acid solution to obtain 95L of 98% solution. What amounts of each should be used?

Mathematics

1 answer:

defon3 years ago

6 0

Answer:

Step-by-step explanation:

Equation:

acid + acid = acid

0.05x + 1.0(95-x) = 0.30*95

----

Multiply thr by 100 to get:

5x + 100*95 - 100x = 30*95

---

-95x = -70*95

---

x = 70L (amt of 5% solution needed)

---

95-x = 25L (amt of 100% solution needed)

==================================================

How many Liters of 100% acid should be used to obtain the solution?

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Step-by-step explanation:

The given is,

Decorative steel made from circular circle of 6 stems

The length of the stem is 45 cm

Step:1

We need to find the total length of the steel used in the decorative steel,

Let, T - Total length of the steel

L - Length of the stem

n - Number of stems used in steel frame

Step:2

Formula to find the total length of the steel is,

$T=$ $l$ × $n$

From given,

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Substitute the values in formula,

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Result:

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