7 szkoły podstawowej

8 szkoły podstawowej

Chemia w zadaniach i przykładach. Zbiór zadań dla klas 7 i 8 szkoły podstawowej.

Chemia

Chemia 7

Chemia 7 i 8

Chemia Nowej Ery 7

Ciekawa chemia 7

Świat chemii 7

Dane :&nbsp; Vr​=0,5 dm3=500 cm3 &nbsp; dr​=1,5 cm3g​ &nbsp;&nbsp; Cp​=60% Szukane :&nbsp;

Dane :&nbsp; Vr1​=200 cm3 &nbsp;&nbsp; dr1​=1,2 cm3g​ &nbsp;&nbsp; Cp1​=15% Vw​=60 cm3 &nbsp;&nbsp; Szukane :&nbsp;

Dane:&nbsp; mw​=1 kg=1000 g &nbsp; mhydratu​=100 g &nbsp; Szukane:&nbsp;

Dane :&nbsp; mr​=250 g &nbsp; Cp​=20% Szukane :&nbsp;

Dane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/10fa973c3445311b42885b39e3875aed39481314e75e83a95b96e323b4d8b485_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/10fa973c3445311b42885b39e3875aed39481314e75e83a95b96e323b4d8b485_big.svg" type="image/svg+xml"></object> &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/38556d0d3c25a2149a75e642701f267f2f8c7694bff7e3b11b62b49963692364_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/38556d0d3c25a2149a75e642701f267f2f8c7694bff7e3b11b62b49963692364_big.svg" type="image/svg+xml"></object> &nbsp;&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/02a4223feb31a3fa10639a177e11a8fb56f2fb28b7e2c7f824018b7a94234670_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/02a4223feb31a3fa10639a177e11a8fb56f2fb28b7e2c7f824018b7a94234670_big.svg" type="image/svg+xml"></object> Szukane :&nbsp;

Dane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/35909125fd24cd1776cbbb75766c148ddeea3bcad8e7f5114f0b55b3cf554e00_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/35909125fd24cd1776cbbb75766c148ddeea3bcad8e7f5114f0b55b3cf554e00_big.svg" type="image/svg+xml"></object> &nbsp;&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/8bf2c8338a223efbdabf1c3adb0c78bf7fef15d5cbab29c9586bb03b9616fc75_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/8bf2c8338a223efbdabf1c3adb0c78bf7fef15d5cbab29c9586bb03b9616fc75_big.svg" type="image/svg+xml"></object> &nbsp;&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/f1760cda8281130fb001f7b6184255c852b22c2ff75485d38882337606f7cc6f_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/f1760cda8281130fb001f7b6184255c852b22c2ff75485d38882337606f7cc6f_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/e7efd4a617a84f5c116d92a807cb5ac0f8562476c18a9015f22d6c027959286f_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/e7efd4a617a84f5c116d92a807cb5ac0f8562476c18a9015f22d6c027959286f_big.svg" type="image/svg+xml"></object> &nbsp;&nbsp; Szukane :&nbsp;

Dane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/81cd1868395de9d604f8b26ce2ef0936d504505d32728e2ba7c5bd068b7471bd_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/81cd1868395de9d604f8b26ce2ef0936d504505d32728e2ba7c5bd068b7471bd_big.svg" type="image/svg+xml"></object> &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/c96f0ef2c73fad3c843a0d7413ba2d36533f6078301aab23211aadcb83d3b519_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/c96f0ef2c73fad3c843a0d7413ba2d36533f6078301aab23211aadcb83d3b519_big.svg" type="image/svg+xml"></object> &nbsp; Szukane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/548714325d639af59e2ad441c18ef1d40762112758d3c246eaefe0247ff3e470_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/548714325d639af59e2ad441c18ef1d40762112758d3c246eaefe0247ff3e470_big.svg" type="image/svg+xml"></object> Rozwiązanie :&nbsp; Masa cząsteczkowa hydratu wynosi :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/7c82234b0a7db02684449b4a52c4c3ccbc4e45eba402ce7729598e72da020d96_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/7c82234b0a7db02684449b4a52c4c3ccbc4e45eba402ce7729598e72da020d96_big.svg" type="image/svg+xml"></object> &nbsp; Masa cząsteczkowa CaCl2 wynosi :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/59c129301b5220d5815ddc4c7540c5ed9ef8f015e616c5fb6a0cf5762c918775_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/59c129301b5220d5815ddc4c7540c5ed9ef8f015e616c5fb6a0cf5762c918775_big.svg" type="image/svg+xml"></object> &nbsp; Ilość gramów CaCl2 znajdująca się w 50 g hydratu oblicza się z proporcji : &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/8e1da7bada8e0d9ea8f8f874f9fc4d59015ddd144c9bbb35f654b9b4a221ef87_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/8e1da7bada8e0d9ea8f8f874f9fc4d59015ddd144c9bbb35f654b9b4a221ef87_big.svg" type="image/svg+xml"></object> &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/c46753a9082487e09bca0897f62e2b543643f9a15dabf43da07808ba3c45379e_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/c46753a9082487e09bca0897f62e2b543643f9a15dabf43da07808ba3c45379e_big.svg" type="image/svg+xml"></object> &nbsp; Czyli :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/bb45532ffdb5511fb724b3731cbef3cfa3d862cf213e9579b4352cbc6bc994b3_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/bb45532ffdb5511fb724b3731cbef3cfa3d862cf213e9579b4352cbc6bc994b3_big.svg" type="image/svg+xml"></object> &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/00093a6518a73eddc2f054056f3604c442e5fb834bc7ac4d7073ef5e63255eaf_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/00093a6518a73eddc2f054056f3604c442e5fb834bc7ac4d7073ef5e63255eaf_big.svg" type="image/svg+xml"></object> &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/e2cf231515adafe020371f58cbff96f4227620fbeab77a72de231434c554590a_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/e2cf231515adafe020371f58cbff96f4227620fbeab77a72de231434c554590a_big.svg" type="image/svg+xml"></object> &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/e67d2a2234530edc53295818d10c7cac074546c5a7c10b59c58c1b252ed65071_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/e67d2a2234530edc53295818d10c7cac074546c5a7c10b59c58c1b252ed65071_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/a6997825fca05b72c614ed438d1cb13a9ef473daf328b6c03b1d6e584001e24e_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/a6997825fca05b72c614ed438d1cb13a9ef473daf328b6c03b1d6e584001e24e_big.svg" type="image/svg+xml"></object> &nbsp; Obliczamy stężenie procentowe korzystając z wzoru: <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/e3b07e33e702fd7e54c61c1e2f34ba89384787b16fe0e432618a0d0ebc3039c2_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/e3b07e33e702fd7e54c61c1e2f34ba89384787b16fe0e432618a0d0ebc3039c2_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/9fd91b0299d69dd561f408b7c1e4eaae3373e796b63710c1d18ae2f517571d23_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/9fd91b0299d69dd561f408b7c1e4eaae3373e796b63710c1d18ae2f517571d23_big.svg" type="image/svg+xml"></object> &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/157cd6866578612846309da88cf3dbc237039bdb4a84742c4db265b01db6c3df_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/157cd6866578612846309da88cf3dbc237039bdb4a84742c4db265b01db6c3df_big.svg" type="image/svg+xml"></object> Odpowiedź: Stężenie procentowe roztworu będzie wynosiło 5,63%.

Dane:&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/b037db215db1d08b96f4047efdd1c877f1c7639346b2d70b4d9fbd7646accf72_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/b037db215db1d08b96f4047efdd1c877f1c7639346b2d70b4d9fbd7646accf72_big.svg" type="image/svg+xml"></object> &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/1f251f2ae799af24a92367e42f5c8b88e58ff6a0ea227edab64dfab5cc31f8b2_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/1f251f2ae799af24a92367e42f5c8b88e58ff6a0ea227edab64dfab5cc31f8b2_big.svg" type="image/svg+xml"></object> &nbsp; Szukane:&nbsp;

Dane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/2e9aa85900fead6ddf3c54c73f964fcb7fd7dbc39f1128f267fd95fe9ecf5cad_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/2e9aa85900fead6ddf3c54c73f964fcb7fd7dbc39f1128f267fd95fe9ecf5cad_big.svg" type="image/svg+xml"></object> &nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/e8dab02e95af701e4db9c0a11a45c0c99c06a26dc92bd8ce08d2b44485cca5a1_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/e8dab02e95af701e4db9c0a11a45c0c99c06a26dc92bd8ce08d2b44485cca5a1_big.svg" type="image/svg+xml"></object> Szukane :&nbsp;

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