What mass of a 4.00% NaOH solution by mass contains 15.0 g of NaOH? concentration of the sodium chloride solution be? 27 – p. 782-3, Problems #7-8, 10-24, 27-28 key, Giancoli Ch. 750 ml of another solution containing 3.3 g/100 ml of solution. Group: Chemistry Chemistry Quizzes : Topic: Solutions Think one of the answers above is wrong? 13 – p. 381, Problems #46-56, 59 key, Giancoli Ch. Can someone help me figure out these 2 problems :/ I'm having trouble .. 1) a 350ml solution of potassium nitrate (KNO3), with a concentration of 36g/L is diluted with 250ml of water. What is the concentration of the solution in g/L? You will need access to a periodic table and a calculator. %%EOF
answer: 3 g/L 6. The LibreTexts libraries are Powered by MindTouch ® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. 18 – p. 516-7, Problems #26-39, Giancoli Ch. Solution: MV = grams / molar mass (x) (1.000 L) = 245.0 g / 98.0768 g mol¯ 1 x = 2.49804235 M to four sig figs, 2.498 M If the volume had been specified as 1.00 L (as it often is in problems like this), the answer would have been 2.50 M, NOT 2.5 M. This quiz will cover percent by mass and by volume problems. The following video looks at calculating concentration of solutions.
x�b```f``�a`b``�`�d@ N0�8��`���r&�Jv����+�ռ�f �0wt00Xt4�`E@1.%y ��x�~�4��������f�a\� If loading fails, click here to try again. Question 1 What is the molarity of an aqueous solution containing 22.5 g of sucrose (C 12 H 22 O 11 ) in 35.5 mL of solution? 16 – p. 465, Problems #13-22 key, Giancoli Ch. What is the molarity of an aqueous solution containing 22.5 g of sucrose (C. A solution contains 28% phosphoric acid by mass. ����*��1'D�Wđ3��e�����n�,��E+� Looks like you’ve clipped this slide to already. 23 0 obj<>stream
��p�����~�����.p��aIAsM�t��ʼn��K����"bZ��4]lE�u�l�����&*� �ư�j
���[(��%���R�%"��4Ɫᗭ9ؗ�9��.�umV.D�6UVKؾfu�o���'�I�ÅK���r�R�ݹJ�U�fvc>�7�d�Uw�% (���N��R|��� )�}��e�Df��Cu�1�8F��шc��U0(���Ԅ`�+�=���������N�3�#'zu��6��w�c]��������Ȑ�D!=��-�. Once you are finished, click the button below. What is the concentration of the diluted solution? H��VMs�6��W�3T���M��I�N��M:c��`� ���V]R���@���dt$��������/�6M�>
�Ҕ�t�(~���1Qb*א��MQB)œ��[��}�;�j7�~���q�����]^6�H� Learn more. Percent by mass is defined as the ratio of the mass of the solute to the mass of the solution. Now customize the name of a clipboard to store your clips. endobj
Example: Many people use a solution of sodium phosphate (Na 3 PO 4 - commonly called TSP), to clean walls before putting up wallpaper. If the percent by volume is 2 % and the volume of solution is 250mL what is the volume of solute in this solution? 19 – p. 549-550, Problems #35-45, 49-51 key, Giancoli Ch. 18 – p. 515-6, Problems #1-11 key, Giancoli Ch. What are the mole fractions of H3PO4 and water in a solution of 14.5 g of H3PO4 in 125 g of water? %����
0000000885 00000 n
0000001682 00000 n
Find concentration of solution … 0.63 M (this is the opposite of a dilutions problem – the V 2 value is smaller than V 1, but otherwise the equation is no different.) The standard formula is C = m/V, where C is the concentration, m is the mass of the solute dissolved, and V is the total volume of the solution. 1500 mL Home 17 – p. 489, Problems #1-13 key, Giancoli Ch. In a 1 M solution, the mole is contained in exactly 1 L of solution. The ratio is then multiplied by one hundred. 20 – p. 578, Problems #9-17 key, Giancoli Ch. 4) To what volume would I need to add water to the evaporated solution in problem 3 to get a solution with a concentration of 0.25 M? Use significant figures. If the solution has a density of 0.9956 g/mL, calculate the molarity of the solution. �x����Z�#�?�x$����#�Q�{�X( ������: y��_�F�F�=��߈@qU��}G��=m��F����'b����K�|F�����x��o:q���R��11~E�}"1�v��� 18 – p. 516, Problems #12-16, 20-22 key, Giancoli Ch. Clipping is a handy way to collect important slides you want to go back to later. 4 0 obj
Percent Solutions. What mass of a concentrated solution of nitric acid (68.0% HNO3 by mass) is needed to prepare 400.0 g of a 10.0% solution of HNO3 by mass? 30 – p. 860, Problems #18-30 key, Giancoli Ch. Your answers are highlighted below. What is the molality of phosphoric acid, H3PO4, in a solution of 14.5 g of H3PO4 in 125 g of water? Please wait while the activity loads. If concentration of solution is 20 %, we understand that there are 20 g solute in 100 g solution. Textbook content produced by OpenStax College is licensed under a Creative Commons Attribution License 4.0 license. Giancoli Ch. ���߷SQY#�M�����R~ 3:"��I(θ�y���IAo���`
� ������ �%��,��0L7��H��1m*��X]EС_�����aD��l�MA~l`1>4]�
9\%������Zs�7N�����˶P3K�qf��1�P���r��ݣV���:��J�H����+�4��W�5
�N�cy�4�B(/��&�1�tJ�YRF�W�H�C�%��O _�C���}��S�;�^0e�7����)1�#�h鳄0�>���jBYrDaj�mp��. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.32 841.92] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>
0
For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. 23 – p. 659, Problems #23-34, 36-39 key, Giancoli Ch. 23 – p. 658-9, Problems #1-4, 7-10 key, Giancoli Ch. 21 0 obj<>
endobj
This collection of ten chemistry test questions deals with molarity. 13 – p. 382-3, Problems #73, 75, 77, 78, 80, 81, 82, 84, 85, 92 key, Giancoli Ch. CONCENTRATION OFSOLUTIONS 2. Percent by volume is defined as the ratio of the volume of the solute to the volume of the solution, multiplied by one hundred. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 15 – p. 433-4, Problems #1-13 key, Giancoli Ch. 30 – p. 860, Problems #1-3, 9-16 key, Giancoli Ch. What is the concentration of the solution in g/L? Watch the recordings here on Youtube! 3 0 obj
Is it possible to obtain 2 liters of a solution of NaOH (Mw = 40) 1 M by diluting a solution containing 0,2 grams of NaOH in 100 ml of solution ? 2) A base solution with a concentration of 660g/L of hydrochloric acid is used to prepare a solution of hydrochloric acid (HCl). endobj
2) A solution is prepared by dissolving 36.4 g CaI2 in 750 mL of water. 22 – p. 629-630, Problems #5-13 & 17 key, Giancoli Ch. 30 – p. 860, Problems #37, 39, 40, 42, 55, 59, 61, 66, 67a, 69 key, List of all practice quizzes for CP Chemistry, Stoichiometry & Limiting Reagents Practice Quiz. If you leave this page, your progress will be lost. In order to prepare 2 liters of a 1 M solution we need 2 moles of NaOH, i.e. 19 – p. 547, Problems #1-18 key, Giancoli Ch. This quiz will cover percent by mass and by volume problems. 10 – p. 281-2, Problems #1-4, 7-20 key, Giancoli Ch. This means that: 1 mL of this solution contains 28 g of phosphoric acid, 100 mL of this solution contains 28 g of phosphoric acid, 1 L of this solution contains 28 mL of phosphoric acid. 21 9
80 grams. For each of the following questions or statements, select the most appropriate response and click its letter: As more salt is dissolved in water, what will happen to the boiling point of that solution? 10 – p. 282, Problems #22-31 key, Giancoli Ch. What is the molarity of a solution that contains 10.0 grams of Silver Nitrate that has been dissolved in … What is the molar concentration of Ca2+ ions in a water sample with a hardness count of 175 mg CaCO3/L? What are the mole fractions of HNO3 and water in a concentrated solution of nitric acid (68.0% HNO3 by mass)?