A student placed 19.0g of glucose (c6h12o6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100ml.- mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 20.0ml- sample of this glucose solution was diluted to 0.500L . How many grams of glucose are in 100ml. of the final solution

Question

A student placed 19.0g of glucose (c6h12o6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100ml.- mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 20.0ml- sample of this glucose solution was diluted to 0.500L . How many grams of glucose are in 100ml. of the final solution

Answer 1

So we have prepared 19.0 g glucose in 100 mL. We now have a 19/100 = 0.19 g/mL (that is, 0.19 g glucose per mL solution).

We take a 20 mL sample of that and place a container. How many g glucose did we transfer? We transferred 0.19 g/mL x 20 mL = 3.8 g to the container. Now we dilute that to 500 mL so we now have a solution that contains 3.8 g in 500 mL. That is 3.8/500 = 0.0076 g/mL and if we take 100 mL of that sample we will have
0.0076 x 100 mL = 0.76 grams glucose. Check my arithmetic.

Answer 2

Well, it seems like we've got a chemistry question here. Let me put on my lab coat and goggles. Okay, let's break it down.

The student started with 19.0g of glucose in 100ml of solution. Then, they took a 20.0ml sample of this solution and diluted it to 0.500L.

Now, to find out how many grams of glucose are in 100ml of the final solution, we need to do a little math. Since the student started with 19.0g of glucose in 100ml, we can set up a proportion:

19.0g / 100ml = Xg / 100ml

Now, we can cross-multiply and solve for X:

X = (19.0g / 100ml) * 100ml

After canceling out the units, we're left with:

X = 19.0g

So, the answer is 19.0 grams of glucose in 100ml of the final solution. Voila!

Well, I hope I didn't sugar-coat that answer too much! If you have any more questions, feel free to ask.

Answer 3

To calculate the grams of glucose in the final solution, we need to use the concept of dilution.

The concentration of the glucose solution before dilution can be determined using the initial mass of glucose and the volume of the solution.

Given:
Mass of glucose = 19.0g
Volume of solution = 100mL

Step 1: Calculate the concentration of the glucose solution before dilution.
Concentration (C1) = Mass of glucose / Volume of solution

Substitute the values:
C1 = 19.0g / 100mL

Step 2: Calculate the concentration of the final solution after dilution.
In dilution, the concentration is inversely proportional to the volume. The formula is:

C1 * V1 = C2 * V2

Where:
C1 = initial concentration
V1 = initial volume
C2 = final concentration
V2 = final volume

Given:
C1 = concentration before dilution
C2 = final concentration (unknown)
V1 = volume before dilution = 20.0mL
V2 = final volume = 0.500L

Substitute the values:
C1 * V1 = C2 * V2

Solve for C2:
C2 = (C1 * V1) / V2

Step 3: Calculate the mass of glucose in the final solution.
Mass of glucose in the final solution = C2 * V2

Substitute the values:
Mass of glucose = C2 * 0.500L

Now, let's calculate the values step-by-step:

Step 1: Calculate the concentration of the glucose solution before dilution.
C1 = 19.0g / 100mL
C1 = 0.19g/mL

Step 2: Calculate the concentration of the final solution after dilution.
C2 = (C1 * V1) / V2
C2 = (0.19g/mL * 20.0mL) / 0.500L
C2 = 7.6g/L

Step 3: Calculate the mass of glucose in the final solution.
Mass of glucose = C2 * 0.500L
Mass of glucose = 7.6g/L * 0.500L
Mass of glucose = 3.8g

Therefore, there are 3.8 grams of glucose in 100mL of the final solution.

Answer 4

To find the number of grams of glucose in 100ml of the final solution, we can use the concept of dilution.

First, let's calculate the concentration of the glucose solution in the volumetric flask.

The student initially dissolved 19.0g of glucose in water and then added water to reach the 100ml mark on the flask.

So, the concentration of the glucose solution in the volumetric flask can be calculated using the formula:

Concentration (in g/ml) = Mass of glucose (in g) / Volume of solution (in ml)

Concentration = 19.0g / 100ml

Now, to find the number of grams of glucose in 100ml of the final solution, we use the concept of dilution.

The student took a 20.0ml sample from the glucose solution in the volumetric flask and diluted it to 0.500L (500ml).

Since the concentration of the glucose solution remains the same, we can set up the following equation:

Concentration (initial) x Volume (initial) = Concentration (final) x Volume (final)

Using this formula, we can find the concentration of the glucose solution in the final 100ml, which is what we're looking for:

Concentration (initial) x 20.0ml = Concentration (final) x 100.0ml

Substituting in the values we have:

19.0g / 100ml x 20.0ml = Concentration (final) x 100.0ml

Solving for Concentration (final):

Concentration (final) = (19.0g / 100ml) x (20.0ml / 100.0ml)

Concentration (final) = 3.80g / 100ml

Finally, to find the number of grams of glucose in 100ml of the final solution, we can convert the concentration to grams per 100ml:

Grams of glucose = Concentration (final) x Volume (final)

Grams of glucose = (3.80g / 100ml) x 100ml

Grams of glucose = 3.80g

So, there are 3.80 grams of glucose in 100ml of the final solution.