A procedure calls for 100ml of 20% H2SO4, SG=1.14. How much of the concentrated acid (98%), SG=1.84, must be diluted with water to prepare 100ml of acid of the required strength?

M of the diluted stuff is

1.14 g/mL x 1000 mL x 0.20 x 1/98 = 2.33M

M of the strong stuff is
1.84 x 1000 x 0.98 x 1/98 = 18.4M

Then use the dilution formula.
mLA x MA = mLB x MB
100 x 2.33 = mLB x 18.4M
Solve for mL B. I obtained approx 13 mL

Well, first things first, let's not make any misteaks here. I don't want you to end up with a sour experience!

To solve this problem, we need to find out how much concentrated acid and water we'll need. Let's break it down, shall we?

Let's assume we need x mL of the concentrated acid (98%) and y mL of water. Now, we know that the total volume is 100 mL. So, we can say:

x + y = 100 (Equation 1)

Now, let's talk about the sulfuric acid. The final solution needs to be 20% H2SO4. Since we have concentrated acid at 98%, we can say:

(0.98x) / 100 = 0.20 (Equation 2)

Now we have two equations with two unknowns. Let's put on our equation-solving hats and get to work!

From Equation 1, we can rewrite it as:

y = 100 - x

Now, plug that into Equation 2 and solve for x:

(0.98x) / 100 = 0.20
0.98x = 0.20 * 100
0.98x = 20
x = 20 / 0.98

Now that we have the value of x, we can find y:

y = 100 - x

Once you've calculated x and y, you'll know how much concentrated acid and water to mix together to get the desired strength!

Just be careful when dealing with those acids. They can be a bit "acid"-ic!

To prepare 100ml of acid with the required strength, we need to calculate how much concentrated acid and water to mix. Let's follow these steps:

Step 1: Calculate the amount of H2SO4 in 100ml of 20% acid solution.
Since the concentration of the acid solution is given as 20%, we can assume that 20ml of the solution is pure H2SO4 (20% of 100ml).

Step 2: Calculate the amount of water in 100ml of 20% acid solution.
Since the total volume is 100ml and 20ml is H2SO4, the remaining volume is water. Therefore, the amount of water in 100ml of the solution is 100ml - 20ml = 80ml.

Step 3: Calculate the amount of concentrated acid needed.
Let's assume x ml of concentrated acid is required to prepare a 100ml solution.
Since the concentration of concentrated acid is given as 98%, 0.98x ml of the concentrated acid will be pure H2SO4.

Step 4: Calculate the amount of water needed.
To dilute x ml of the concentrated acid to a final volume of 100ml, we need to add 100ml - x ml of water.

Step 5: Set up an equation based on the amount of H2SO4.
We need to ensure that the sum of the H2SO4 from both the concentrated acid and the initial acid solution is equal to the required amount of H2SO4 (20ml).
0.98x + 20ml = 20ml
0.98x = 20ml - 20ml
0.98x = 0ml
x = 0ml

Step 6: Interpret the result.
The equation shows that no amount of concentrated acid is needed to prepare the desired solution. This suggests that the initial solution already has the required strength, and no further dilution or addition of concentrated acid is necessary.

To answer this question, we need to determine the amount of concentrated acid (98%) and water required to obtain 100ml of the desired concentration.

Let's break down the problem into two steps:

Step 1: Calculate the amount of pure acid in the concentrated solution (98% H2SO4):

In 100ml of 20% H2SO4, we have:
- 20% = 20/100 = 0.2 (fraction of H2SO4 concentration)
- 100ml * 0.2 = 20ml of pure H2SO4

Step 2: Determine the amount of concentrated acid (98%) needed and the amount of water required:

Let's assume we need x ml of concentrated acid (98%) to make a total volume of 100ml.

The concentration of the diluted solution is given by the equation:
(20ml + x ml of pure H2SO4) / 100 ml = 20% concentration

To find the value of x, we can rearrange the equation:
x ml of pure H2SO4 = (20% concentration - 20ml) * 100 ml
x ml of pure H2SO4 = (20% - 0.2) * 100 ml
x ml of pure H2SO4 = 0.18 * 100 ml
x ml of pure H2SO4 = 18 ml

This means that you will need 18 ml of concentrated H2SO4 (98%) to prepare 100 ml of the desired strength. To dilute the concentrated acid, you would add 82 ml of water (100 ml - 18 ml) to reach a total volume of 100 ml.